Free Essay

Controlling Alternative Splicing

In:

Submitted By kals88ny
Words 1025
Pages 5
Controlling Alternative Splicing via Cell Signaling Pathways
On November 18, 2014, Dr. Kristen W. Lynch’s seminar topic was about how the cell signaling pathways can control the process of alternative splicing. Dr. Lynch’s started the seminar by mentioning that about 95% of human genes undergo alternative splicing. Those genes that undergo alternative splicing further change the Open Reading Frame (ORF). ORF is a reading frame of nucleotides that begins with start codon and ends with stop codon, which can translate into polypeptide chains. Therefore, Lynch’s gave the example of how the alternative splicing of CD45 gene alters in the production of different mRNAs that further produces different proteins (polypeptide chains). Thus, the difference in the production of functional protein (tyrosine phosphatase protein) has played the role in the regulation of development and maturation of T-cells, a lymphocyte cell. The difference in the production of tyrosine phophatase protein is due to the variation in alternative splicing of exon 4, 5 and 6 of CD45 gene in T-cells. Multiple signaling pathways that are induced by antigen signaling in turn regulate the alternative splicing. Some of the multiple signaling pathways that Dr. Lynch had mentioned are RAS (G-protein), Glycogen Synthase Kinase-3 (GSK-3) and c-Jun (c-Jun N-terminal Kinase or JNK) signaling. However, Dr. Lynch had illustrated the GSK-3 and JNK signaling pathway. In GSK-3 signaling, PSF is phosphorylated. PSF usually binds to the Exon splicing silencer (ESS) and plays the role in skipping of those exons or silencing of the expression of that particular exon during alternative splicing. Under the resting conditions of T-cells, the PSF is phosphorylated at Threonine 687. The phosphorylated PSF will undergo the conformation change. Thus, the altered conformation of PSF will be recognized by TRAP-150 protein and the PSF-TRAP150 will interact to each other. The interaction of PSF-TRAP150 to each other will prevent the PSF from binding to the ESS. The hn RNP L is already bounded to the ESS for the silencing of those exons. However, the phosphorylated PSF will not be able to bind to the ESS. Hence, the exons are partially repressed during the resting conditions of T-cells (as shown in the following figure 1).

Figure 1: It shows the interaction of PSF with the TRAP-150 that prevents the binding of the PSF to the Exon Splicing Silencer (ESS). hnRNP L ( repressor) is already bounded to the ESS but the phosphorylated PSF cannot bind to the ESS (Lynch, K., and Mena, M. L, 2013). On the other hand, when the foreign antigen activates the T-cell then the T-cell further deactivates the GSK-3. The inactive GSK-3 would not be able to phosphorylated the PSF. The unphosphorylated PSF cannot interact with TRAP-150. Thus, PSF is free to bind to the ESS along with repressor hnRNP L and hnRNP LL. L and LL had competed with splicing factors (activator of splicing) for binding to the Enhancer element. The binding of PSF to the ESS had stabilized the binding of L and LL to the enhancer sequence of CD45 pre-mRNA. Hence, the exon 4 and 5 of pre-mRNA of CD45 is fully repressed as shown in the figure 2.

Figure 2: It shows the free unbound PSF that can easily bind to the Exon Splicing Silencer along with L and LL. As a result, exon 4 and 5 of CD45 are fully repressed (Lynch, K., and Mena, M. L, 2013).
The second signaling pathway that Dr. Lynch had mentioned was about the JNK (or c-Jun N-terminal Kinase) signaling. Dr. Lynch talked about how the activation of c-Jun regulates the transcriptional activity of T-cells. The summary of regulation of transcription through JNK or Jun signaling pathway is shown in the following figure 3.

Figure 3: It shows the signaling pathway of Jun or JNK that regulates the transcriptional activity (I did not use any other source to draw this signaling pathway diagram).
TAK1 is a protein kinase that plays the role in the regulation of transcription. The encounter of foreign antigen by T-cells stimulates the TAK1 kinase. TAK 1 kinase will in turn activates the MKK7 (Mitogen activated protein kinases-7), which is very important component for the JNK signaling transduction pathway. The MKK7 is activated by phosphorylation, which results into the skipping of exon 2 in MKK7 mRNAs. The disruption in skipping of exon 2 of MKK7 reduces the JNK activity. In contrast, when the splice sites are blocked with the help of antisense morpholino oligos or AMO (that blocks the splicing sites in pre-mRNA to modify the splicing events), it induces the skipping of exon 2 in MKK7. The skipped exon 2 of activated MKK7 produces the phosphorylated MKK7 protein kinase. The phosphorylated MKK7 kinase further phosphorylates the threonine and tyrosine residues that are located (within the Threonine-Proline-Tyrosine motif) in kinase subdomain VIII of JNK. The phosphorylated JNK will activate the jun gene. The activated jun gene will produce the c-jun, a protein in human that combines with the other such as c-Fos to form a transcription factor. The increasing amount of transcription factor will induce the differentiation and the activation of T-cells in response to the attacked of foreign antigens. Therefore, Dr. Lynch had revealed that how the alternative splicing, which is regulated by the cell signaling pathway i.e GSK-3 and JNK regulates the development and maturation of T-cells.

Works Cited:
1.Lynch, K., & Metta, L.M. (2013). Alternative Splicing. Encyclopedia of Biological Chemistry, vol. 1, 75-80.
2. Shankarling, G., Cole, B. S., Mallory, M. J., & Lynch, K. W. (2014). Transcriptome-wide RNA interaction profiling reveals physical and functional targets of hnRNP L in human T cells. Molecular and cellular biology, 34(1), 71-83.
3. Tournier, C., Dong, C., Turner, T. K., Jones, S. N., Flavell, R. A., & Davis, R. J. (2001). MKK7 is an essential component of the JNK signal transduction pathway activated by proinflammatory cytokines. Genes & development, 15(11), 1419-1426.
4. http://www.gene-tools.com/

Similar Documents

Free Essay

Alternative Splicing

...It has been suggested that alternative splicing plays a forefront role in creating a complex collection of expressed sequences (mRNA) from a smaller number of genes in humans. In fact, Walter Gilbert had expressed that a variety of mRNA isoforms of one gene arises from different combinations of exon-splicing known as alternative splicing (Modrek & Lee, 2002). Alternative splicing can be classified into several types, with each type being different among species. Exon skipping is a type wherein a cassette exon and its bordering introns are spliced out of the transcript. This type is prevalent in higher eukaryotic forms. Two other types of alternative splicing are alternative 3’ splice site (3’ SS) and 5’ SS selection in which two or more splice sites are identified at one end of an exon. These two types account for a small percentage of alternative splicing in higher eukaryotes. Another type of alternative splicing is intron retention, characterized by an intron persisting in the mature mRNA transcript. It is the rarest type of alternative splicing in both vertebrates and invertebrates, but the most prevalent in plants, fungi, and protozoa (Keren et al., 2010). In the wake of discovering these alternative mRNA forms that diversify protein functions of the same gene, there, however, exists a problem of how to differentiate truly functional forms from those that are not, biologically or otherwise, which further opens up an avenue towards the risk of outright designating a discovered...

Words: 974 - Pages: 4

Free Essay

Biology: Concepts and Connections 5e Chapter 11

...Biology: Concepts and Connections, 5e (Campbell) Chapter 11: The Control of Gene Expression 1) Which of the following are problems created by cloning? A) Cloning endangered species may de-emphasize the need to preserve critical natural habitats. B) Cloning does not increase genetic diversity in the cloned species. C) Cloned animals are less healthy than animals created by natural methods. D) All of the choices are problems created by cloning. E) None of the choices are problems created by cloning. Topic: Introduction Skill: Factual Recall 2) The ability to use the nucleus from an adult somatic cell to create all of the cell types in a new organism demonstrates that development depends upon A) the control of gene expression. B) the timing of mitosis and meiosis. C) the timing of meiosis and cell migrations. D) the deposition of materials in the extracellular matrix. E) the position of cells within an embryo. Topic: Introduction Skill: Conceptual Understanding 3) The term gene expression refers to the A) fact that each individual of a species has a unique set of genes. B) fact that individuals of the same species have different phenotypes. C) process by which genetic information flows from genes to proteins. D) fact that certain genes are visible as dark stripes on a chromosome. E) flow of information from parent to offspring. Topic: 11.1 Skill: Conceptual Understanding 4) In a prokaryote, a group of genes with related functions, along...

Words: 3118 - Pages: 13

Free Essay

Optical Fiber Networking

...TABLE OF CONTENTS Abstract …............ ….... ........ ...... ..... ....... …..... ..... ..... ..... ........ .... .... 3 Introduction...... …........ …......... …........ …........... …............ …........ … 3-4 What is Optical Networking........... .......... ......... ........ ............ ................ 4 Standards........ ….... ….............. …........... …......... …........... ….......... .. 4 Historical Milestones........ …... …... …...... ….... …......... …....... …....... 4 Optical Networking why......... ….......... …..................... …................ …. 5 Principles and Operation............... …................. …........ ….............. …... 5-8 Single Mode Fiber............ …........................ ….................. …...... 6 Multimode Fiber................. ….................. ….............. …........ … 6-7 Optical Networking Tools.............. …............... …............. …............ ….. 8-10 Fiber Optic Splicers................. …............. ….... …........... …........ 8-9 Fiber Optic connectors.................. …............... …................. ….... 9 Fiber optic couplers........... …................. …............. …............ …. 9 Fiber Optic Transmitters................ ….................. …............ …...... 9 Fiber Optic Receivers............ ….................. …............ …..... ….... 10 Types Of Optical Networks.............. …........................... …............. …..... Optical...

Words: 3428 - Pages: 14

Free Essay

Gene Expresion

...1. DEFINATION: Nuclear receptors are a superfamily of ligand activated transcription factors that modulate specific gene expression. Currently there are 100 nuclear receptor are identified[1]. 2. INTRODUCTION: In the field of molecular biology, nuclear receptors are a class of proteins found within other molecules. In response, these receptors work in concert with other proteins to regulate the expression of specific genes thereby controlling the development, homeostasis, and metabolism of the organism. Nuclear receptors have the ability to directly bind to DNA and regulate the expression of adjacent genes, hence these receptors are classified as transcription factors. The regulation of gene expression by nuclear receptors only happens when a ligand—a molecule which affects the receptor's behavior is present. More specifically, ligand binding to a nuclear receptor results in a conformational change in the receptor which in turn activates the receptor resulting in up-regulation of gene expression. A unique property of nuclear receptors which differentiate them from other classes of receptors is their ability to directly interact with and control the expression of genomic DNA. Consequently nuclear receptors play key roles in both the embryonic development and adult homeostasis of organisms [2, 3, 4]. 3. LIGANDS: Ligands that bind to and activate nuclear receptors include lipophilic substances such as endogenous hormones, vitamins A and D, and xenobiotic endocrine disruptors...

Words: 5233 - Pages: 21

Premium Essay

Bato Balani

...JUNIOR 1 S Y 2000 - 2 0 0 1 V o l . 20 N o . 1 C O N T E N FOR LOVE OF DIAMONDS These brilliant gems are not only for fashion but find many uses in other industries as well. CHEMISTRY: BUILDING BLOCKS OF MODERN CIVILIZATION Understand the significance of chemistry throughout man’s history. NUCLEAR CHEMISTRY: TOWARDS A SAFE ENERGY SOURCE Is nuclear technology a boon or bane of science? Read on. T S ib er s, De ar BB su bs cr ng ga zin e is ma ki Ba to Ba la ni ma e ma ga zin e. to yo ur fa vo rit lled so me ch an ge s a new section ca c g the changes is Amon s wi th sc ie nt ifi .” It de al “P se ud os ci en ce pt io ns th at an d mi sc on ce ve no tio ns , my th s, e. Al so , we ha pu la r at on e tim we re po ” se ct io n to “C yb er wo rld ex pa nd ed ou r ac tiv ity se ct io n. e a we b- lin ke d in cl ud wi ll th es e ch an ge s We ho pe th at re nc e stu di es mo ur sc ie he lp ma ke yo jo y! re fu n! En re le va nt an d mo Th e Ed ito r MEDICINE’S POTENT MIXTURES AND SOLUTIONS Chemistry plays a major role in our existence through important medical applications. R E G U L A R F E AT U R E S 3 Science & Technology News 5 Filipino Scientists and Inventors BOARD OF ADVISERS Violeta Arciaga, Jaime F. Bucoy Jose C. Calderon, Victoria V. Cervantes, Juanita M. Cruz, Belen P. Dayauon Medical Facts and Fallacies 9 Livelihood Technology / I’d Like to Know 10 Cyber World CONSULTANT ...

Words: 8787 - Pages: 36

Premium Essay

Food Web Diagram

...Unit II: Genetics Brief Overview Reading: Chapters 3, 4, 9-12, 14 (Note: you have reviewed much of this already) The earth is teeming with living things. We can easily see some of the larger organisms—trees, grass, flowers, weeds, cats, fish, squirrels, dogs, insects, spiders, snails, mushrooms, lichens. Other organisms are everywhere, in the air, in water, soil and on our skin, but are too small to see with the naked eye—bacteria, viruses, protists (single celled eukaryotes such as amoebae), and tiny plants and animals. Life is remarkable in its complexity and diversity, and yet it all boils down to a very simple idea—the instructions for making all this life are written in nucleic acids, usually DNA. Most organisms have a set of DNA that contains the instructions for making that creature. This DNA contains four “letters” in which these instructions are written—A, T, G, and C. The only difference between the code for a dog and the code for a geranium is in the order of those letters in the code. If you took the DNA from a human and rearranged the letters in the right way, you could produce an oak tree—arrange them slightly differently and you would have a bumble bee—arrange them again and you would have the instructions for making a bacterium. Acting through more than two billion years, the process of evolution has taken one basic idea—a molecular code that uses four letters—and used it over and over, in millions of combinations to produce a dazzling array of life forms...

Words: 32016 - Pages: 129

Free Essay

Innovation Audit

...Motivating Creativity in Organizations: O N DOING WHAT YOU LOVE AND LOVING WHAT You Do Teresa M. Amabile A rthur Schawlow, winner of the Nobel prize in physics in 1981, was once asked what, in his opinion, made the difference between highly creative and less creative scientists. He replied, "The labor of love aspect is important. The most successful scientists often are not the most talented. But they are the ones who are impelled by curiosity. They've got to know what the answer is."' Schawlow's insights about scientific creativity highlight the importance of intrinsic motivation: the motivation to work on something because it is interesting, involving, exciting, satisfying, or personally challenging. There is abundant evidence that people will be most creative when they are primarily intrinsically motivated, rather than extrinsically motivated by expected evaluation, surveillance, competition with peers, dictates from superiors, or the promise of rewards.^ Interestingly, this Intrinsic Motivation Principle of Creativity applies not only to scientific creativity, but to business creativity as well. Often, financial success is closely tied to a passion for the work itself. Michael Jordan, who by the mid-1990s was the most financially successful basketball player in history, insisted on a "love of the game" clause in his contract—securing for him the right to play in "pick-up" games whenever he wished. Robert Carr, a primary developer of the first pen computer, was captivated...

Words: 8565 - Pages: 35

Premium Essay

Masculinity in Chuck Palahniuk's Work

...Introduction Mass culture would have most readers and viewers believing that the Post-modern American male is a simple creature. Common stereotypes margin male satisfaction in a minimal setting – a Lazyboy armchair in a lounge with a flat screen TV playing ‘the game’ along with primal banter regarding women. More often than not, this is washed down with a beer. With this array of comfort and leisure we are inclined to believe that male lifestyle has reached its peak on the timeline of satisfaction. This was until David Fincher took Chuck Palahniuk’s novel Fight Club and made it into a big budget Hollywood blockbuster. With the male demographic being the hardest to pinpoint in the literature sense, David Fincher’s adaptation helpfully put Palahniuk’s thoughts into the cinematic forefront. This increased the popularity of Palahniuk’s other works and placed him in the cannon of Post-modern American fiction. It is the issues of modern masculinity that grasps critics’ attention more so than any other Palahniuk themes. It is very apparent that masculinity has changed as a natural progression of modernisation. This dissertation will analyse masculinity as it is depicted in Palahniuk’s writings and explore Palahniuk’s intentions and beliefs. I will interpret the responses of select critics in order to gain some understanding of what Palahniuk deems to be the ideal model of masculinity in the modern world, beneath his post-modern twists, transgressive characterization and...

Words: 7055 - Pages: 29

Premium Essay

The Trends

...to form a remarkably detailed picture of what lies ahead. This is Part Two of FI’s periodic trend report. It covers trends in energy, the environment, technology, management and institutions, and terrorism. (Part One, published in the May-June 2010 issue of THE FUTURIST, tracked economic, population, societal, family, and work trends.) Because this forecast project is ongoing, the authors — and the World Future Society — welcome your feedback. 38 THE FUTURIST July-August 2010 © 2010 World Future Society • 7910 Woodmont Avenue, Suite 450, Bethesda, MD 20814, U.S.A. • All rights reserved. JULIEN GRONDIN / ISTOCKPHOTO Energy Trends 40% in 1999 to about 37% in 2020. n Despite efforts to develop alternative sources of energy, oil consumption is still rising rapidly. • The world used only 57 million barrels of oil per day in 1973, when the first major price shock hit. By 2008, it was using 86 million barrels daily, according to the U.S. Energy Information Administration (EIA). This was slightly more than it produced that year. • The United States alone consumed about 19.5 million barrels of oil per day in 2008 (22.8% of world total), down from 20.7 million in 2004 (25.1% of world total). U.S. petroleum consumption is projected to increase to 22 million barrels per day by 2035. • In 2008, China...

Words: 12752 - Pages: 52

Premium Essay

Unit 5 Bio Notes

...A2 Biology Unit 5 page 1 AQA A2 Biology Unit 5 Contents Specification Human Nervous system Nerve Cells The Nerve Impulse Synapses Receptors Muscle Animal Responses Control of Heart Rate The Hormone System Homeostasis Temperature Homeostasis Blood Glucose Homeostasis Control of Mammalian Oestrus Plant Responses The Genetic Code Protein Synthesis Gene Mutations Stem Cells Control of Gene Expression Biotechnology DNA sequencing Southern Blot In vivo cloning Genetically Modified Organisms Gene Therapy Genetic Screening and Counselling 2 4 6 0 14 17 24 28 30 33 34 38 42 44 48 50 54 57 63 66 71 76 80 85 89 92 Molecular Genetics These notes may be used freely by A level biology students and teachers, and they may be copied and edited. Please do not use these materials for commercial purposes. I would be interested to hear of any comments and corrections. Neil C Millar (nmillar@ntlworld.co.uk) Head of Biology, Heckmondwike Grammar School High Street, Heckmondwike, WF16 0AH Jan 2010 HGS Biology A-level notes NCM 8/09 A2 Biology Unit 5 page 2 Biology Unit 5 Specification Control Systems Organisms increase their chance of survival by responding to changes in their environment. The Nerve Impulse The structure of a myelinated motor neurone. The establishment of a resting potential in terms of differential membrane permeability, electrochemical gradients and the movement of sodium and potassium ions. Changes in membrane permeability lead to depolarisation and the...

Words: 26586 - Pages: 107

Free Essay

Photovoltaic White Paper

...Photovoltaic Power Systems Compiled by Tracy Dahl Overview Photovoltaic (PV) technology converts one form of energy (sunlight) into another form of energy (electricity) using no moving parts, consuming no conventional fossil fuels, creating no pollution, and lasting for decades with very little maintenance. The use of a widely available and reasonably reliable fuel source—the sun—with no associated storage or transportation difficulties and no emissions makes this technology eminently practicable for powering remote scientific research platforms. Indeed, numerous examples of successfully deployed systems are already available. The completely scaleable nature of the technology also lends itself well to varying power requirements–from the smallest autonomous research platforms to infrastructure-based systems. This technology can be limited, however, by annual fluctuations in solar insolation, especially at extreme latitudes. Based on semiconductor technology, solar cells operate on the principle that electricity will flow between two semiconductors when they are put into contact with each other and exposed to light (photons). This phenomenon, known as the photovoltaic effect, was first discovered by Edmund Becquerel in 1839. Actual development of PV technology began in the 1950s and gained greater impetus through the NASA space program during the 1960s. Research continues today at national laboratories and within private industry, focusing on increasing conversion efficiencies...

Words: 12210 - Pages: 49

Free Essay

Osha Cabling Standars

...------------------------------------------------- Top of Form Bottom of Form This website is currently not being updated due to the suspension of Federal Government services. The last update to the site was October 1, 2013. Updates to the site will start again when the Federal Government resumes operations. If you need to report a workplace fatality, hospitalizations, an imminent danger situation, or you are filing a hazard complaint, please contact our toll free number: 1-800-321-OSHA (6742); TTY 1-877-889-5627 (or contact OSHA’s area and regional offices during normal business hours.) Federal Registers - Table of Contents | • Publication Date: | 02/14/2007 | • Publication Type: | Final Rules | • Fed Register #: | 72:7135-7221 | • Standard Number: | 1910 | • Title: | Electrical Standard; Final Rule | | | | [Federal Register: February 14, 2007 (Volume 72, Number 30)] [Rules and Regulations] [Page 7135-7221] From the Federal Register Online via GPO Access [wais.access.gpo.gov] [DOCID:fr14fe07-14] ----------------------------------------------------------------------- Part II Department of Labor ----------------------------------------------------------------------- Occupational Safety...

Words: 91983 - Pages: 368

Premium Essay

Crossinf the Chasm

...CROSSING THE CHASM. Copyright © 1991 by Geoffrey A. Moore. All rights reserved under International and Pan-American Copyright Conventions. By payment of the required fees, you have been granted the non-exclusive, non-transferable right to access and read the text of this e-book on-screen. No part of this text may be reproduced, transmitted, downloaded, decompiled, reverse engineered, or stored in or introduced into any information storage and retrieval system, in any form or by any means, whether electronic or mechanical, now known or hereinafter invented, without the express written permission of PerfectBound™. PerfectBound ™ and the PerfectBound™ logo are trademarks of HarperCollins Publishers. Adobe Acrobat E-Book Reader edition v 1. October 2001 ISBN 0-06-018987-8 The original hardcover edition of this book was published in 1991 by HarperBusiness, a division of HarperCollins Publishers. 10 9 8 7 6 5 4 3 2 1 To Marie Contents PREFACE TO THE REVISED EDITION FOREWORD ACKNOWLEDGMENTS PART I Discovering the Chasm INTRODUCTION If Bill Gates Can Be a Billionaire 1 High-Tech Marketing Illusion 2 High-Tech Marketing Enlightenment PART II Crossing the Chasm 3 The D-Day Analogy v vi Contents 4 5 6 7 Target the Point of Attack Assemble the Invasion Force Define the Battle Launch the Invasion CONCLUSION Getting Beyond the Chasm About the Author Credits About the Publisher Front Cover Preface to the Revised Edition “Obiwan Kenobi,” says Sir...

Words: 77194 - Pages: 309

Free Essay

Fblthp

...Magic: The Gathering Comprehensive Rules These rules are effective as of July 17, 2015. Introduction This document is designed for people who’ve moved beyond the basics of the Magic: The Gathering® game. If you’re a beginning Magic™ player, you’ll probably find these rules intimidating. They’re intended to be the ultimate authority for the game, and you won’t usually need to refer to them except in specific cases or during competitive games. For casual play and most ordinary situations, you’ll find what you need in the Magic: The Gathering basic rules. You can download a copy of the basic rules PDF from the Wizards of the Coast® Magic rules website at Magic.Wizards.com/EN/Rules. If you’re sure this is where you want to be, keep reading. This document includes a series of numbered rules followed by a glossary. Many of the numbered rules are divided into subrules, and each separate rule and subrule of the game has its own number. (Note that subrules skip the letters “l” and “o” due to potential confusion with the numbers “1” and “0”; subrule 704.5k is followed by 704.5m, then 704.5n, then 704.5p, for example.) We at Wizards of the Coast recognize that no matter how detailed the rules, situations will arise in which the interaction of specific cards requires a precise answer. If you have questions, you can get the answers from us at Wizards.com/CustomerService. Additional contact information is on the last page of these rules. In response to play issues and to...

Words: 111213 - Pages: 445

Free Essay

Ewewe

...An Analysis of Small Business Patents by Industry and Firm Size by Anthony Breitzman, Ph.D. and Diana Hicks, Ph.D. Haddonfield, NJ 08033 for Under contract no. SBAHQ-07-Q-0010 Release Date: November 2008 This report was developed under a contract with the Small Business Administration, Office of Advocacy, and contains information and analysis that was reviewed and edited by officials of the Office of Advocacy. However, the final conclusions of the report do not necessarily reflect the views of the Office of Advocacy. Office of Advocacy ww w.sba.gov/advo Small Business Research Summary Advocacy: the voice of small business in government No. 335 November 2008 An Analysis of Small Business Patents by Industry and Firm Size Anthony Breitzman and Diana Hicks., Haddonfield, NJ 08033 2008 [60] pages. Under contract no. SBAHQ-07-Q-0010 Background This study is the third in a series that examines small business patent activity. The authors created a database of 1,293 technology firms with 15 or more patents issued between 2002 and 2006. These firms are designated as innovative firms because of their high level of patent activity. Using this database, the authors analyze the relative strengths of small and large technology businesses, including information such as the industry and technology within which the firm patents and the importance of the patent. The results demonstrate that small businesses that innovate are indeed special and that the technology...

Words: 31696 - Pages: 127