Navigation Links
Introns: A mystery renewed
Date:12/10/2009

gain rates, and directly challenges the assumption that parallel intron gains are rare in many prior analyses."

Whether or not Daphnia is typical of eukaryotes with respect to intron gain (and loss), IU Bloomington evolutionary biologist Michael Lynch, the project's principal investigator, agreed that the discovery of parallelism will surprise his colleagues.

"Remarkably, we have found many cases of parallel intron gains at essentially the same sites in independent genotypes," Lynch said. "This strongly argues against the common assumption that when two species share introns at the same site, it is always due to inheritance from a common ancestor."

A unique and important aspect of the scientists' work is that they focused on one species (Daphnia pulex). Past studies have looked at a few introns shared by vastly different species. In doing so, geneticists have almost certainly missed the ephemeral appearance of new introns, and therefore would come to the wrong conclusions about how introns are gained, why they are lost, and how frequently either occurs.

That many introns are not acquired from a common ancestor but are the result of separate insertion events, the scientists say, means that the rates of intron gain in any species' lineage could be considerably higher than currently estimated.

Even if the rates of intron gain and loss of introns in Daphnia pulex are unlike those found in humans, sunflowers, and mushrooms, the Science report suggests geneticists and genome biologists take another look at introns, some of which could have been the result of hot spot insertion events in separate lines.

"The immediate question will be whether our findings can readily be extended to other species," Lynch said. "We are, in fact, doing that now. In addition, there is need for some solid molecular work to test our hypothesis about the mechanism of intron origin."

Intron is short for "intrageni
'/>"/>

Contact: David Bricker
brickerd@indiana.edu
812-856-9035
Indiana University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Scientists are first to unlock the mystery of creating cultured pearls from the queen conch
2. Mystery solved: Marine microbe is source of rare nutrient
3. Baylor researchers unravel mystery of DNA conformation
4. Mystery E. coli genes essential for survival of many species
5. Mystery of bat with an extraordinary nose solved
6. Harvard scientists solve mystery about why HIV patients are more susceptible to TB infection
7. Scientists tackle the mystery of white-nose syndrome in bats
8. Scientists unravel the mystery of white-nose syndrome
9. Research team wins funds to unravel a DNA mystery
10. Genetic sleuth solves glaucoma mystery
11. Life secret exposed: Scientists unlock mystery of molecular machine
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Introns: A mystery renewed
(Date:12/19/2014)... Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) ... Monitor: North America Perimeter Security Systems Market" report ... The North American perimeter security market ... from 2014 to 2019. Although the U.S. market holds ... is expected to grow at a higher ...
(Date:12/17/2014)... 15, 2014 Research and Markets ... the "Samsung Galaxy S5 - Home Button ... their offering. http://photos.prnewswire.com/prnh/20130307/600769 ... sensing technology than the iPhone 5S, Samsung introduces ... its product. The Galaxy S5 home ...
(Date:12/17/2014)... N.C. , Dec. 16, 2014 Valencell, ... licensed its PerformTek biometric technology to industry leaders such ... highly accurate, clinically validated, biometric wearable products. These products ... 6-9 in Las Vegas . ... technology is accurate, flexible and robust – with the ...
Breaking Biology News(10 mins):Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2
... shirts in the shirt drawer, the time-honored lessons of helping ... of the brain are used to encode such categories as ... learning take place? , New research from Harvard Medical School ... such memories are found. They report in the advanced online ...
... of fast, effective treatments for cancer and viruses. , ... Nature Biotechnology, scientists describe how they have manipulated a ... a potential therapeutic tool. , "The process, called RNA ... and viruses," said research leader and Director of the ...
... only one strain of an infectious disease can exist ... study in the August issue of The American Naturalist, ... a mathematical model to help explain multiple strains, showing ... found that the coexistence of multiple infectious disease strains ...
Cached Biology News:Everything in its place: Researchers identify brain cells used to categorize images 2Everything in its place: Researchers identify brain cells used to categorize images 3
(Date:12/24/2014)... Vermillion, Inc. (Nasdaq:   VRML), a ... today that investors including Oracle Investment Management, ... several Vermillion directors have agreed to purchase approximately ... stock and warrants to purchase unregistered shares of ... Under the terms of the private ...
(Date:12/24/2014)... Dec. 23, 2014 Sigma-Aldrich Corporation (NASDAQ: ... waiting period under the Hart-Scott-Rodino Antitrust Improvements Act ... on December 22, 2014, thereby completing the U.S. ... the acquisition of the Company by Merck KGaA, ... satisfies another condition to closing the transaction, which ...
(Date:12/24/2014)... NEW YORK , Dec. 23, 2014 /PRNewswire/ ... study of mazindol in children with attention deficit/hyperactivity disorder ... December 2014 . The paper, titled ... attention deficit/hyperactivity disorder" ( Konofal et al, ... eCollection 2014 ) shows that mazindol might be ...
(Date:12/22/2014)... ROCKVILLE, Md. , Dec. 22, 2014 ... MKT: SYN), a developer of pathogen-specific therapies ... focus on protecting the microbiome, today announced ... a Phase 1a clinical trial of SYN-004, ... the prevention of Clostridium difficile (C. ...
Breaking Biology Technology:Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 3Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 4Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 5Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 2Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 2Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 3Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 4Synthetic Biologics Announces Positive Topline Results from Phase 1a Trial of SYN-004 for the Prevention of C. difficile Infection 5
... Direct, a wholly owned subsidiary of Medco Health Solutions, ... provider of guidance and decision support for genomic medicine, ... Atlantic Health of Morristown, New Jersey, Crittenton Hospital Medical ... Chicago, Illinois, have joined the Genomic Medicine Network to ...
... 31, 2011 Caliper Life Sciences, Inc. (Nasdaq: ... agreed to a long-term, exclusive arrangement under which Caliper will ... North America. With the LabChip DS, an ... analyze the concentration levels of up to 96 nucleic acid ...
... Plus is pleased to offer Clinical and Non-Clinical ... health care organizations for front line selection and ... increase patient satisfaction and employee engagement and reduce turnover ... diminished medical errors and infection rates, better team dynamics, ...
Cached Biology Technology:Four Community Hospitals Join DNA Direct's Genomic Medicine Network 2Four Community Hospitals Join DNA Direct's Genomic Medicine Network 3Caliper Life Sciences Launches Microfluidic LabChip® DS Platform for UV/VIS Spectral Analysis of Nucleic Acid and Protein Samples 2Caliper Life Sciences Launches Microfluidic LabChip® DS Platform for UV/VIS Spectral Analysis of Nucleic Acid and Protein Samples 3Talent Plus' Health Care Talent Online® Assessments 2Talent Plus' Health Care Talent Online® Assessments 3
... host strains are K-12 derivatives that have ... and glutathione reductase (gor) genes, which greatly ... Studies have shown that expression in Origami(DE3) ... another host even though overall expression levels ...
Recommend to use at 1000X dilutions for cell culture (e.g. Add 1 ul to 1 ml of culture medium.)...
... Kit, 1 kit. Convenient way ... Conjugations are carried out under mild ... Dyes are packaged in premeasured amounts ... Category: Blotting & Labeling & Detection, ...
Recombinant Human Erythropoietin (Tissue Culture Grade)...
Biology Products: