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:9/30/2014)... and Howard Hughes Medical Institute investigator, and Margarita ... in the 2014 round of grants from the ... (Brain Research through Advancing Innovative Neurotechnologies) Initiative for ... 30, provides more than $3 million in funding ... The BRAIN Initiative, launched last year, is a ...
(Date:9/30/2014)... exposure to tetrachloroethylene (PCE) in drinking water may ... according to a new study led by a ... The study, published in the journal Environmental ... unexposed pregnancies among 1,766 women in Cape Cod, ... 1960s to the early 1980s by the installation ...
(Date:9/30/2014)... live in almost any aquatic environment on Earth, but ... species are pushed to the limit. The amount of ... critical for how different species cope in the future, ... of Gothenburg, published in the scientific journal Proceedings ... continues apace thanks to increasing levels of greenhouse gases ...
Breaking Biology News(10 mins):Salk scientists receive $3 million for BRAIN Initiative grant 2Contaminated water linked to pregnancy complications, BU study finds 2Shape up quickly -- applies to fish, too! 2
... treatment that spares disability from acute stroke may be ... ?a potential advance needed to benefit more stroke victims. ... that human umbilical cord blood cells administered to rats ... inflammatory response, reducing the size of the stroke and ...
... Universities of Heidelberg and Ulm and a unit of ... have discovered that a specific signal within brain cells ... stroke. Their study, published online (November 13) by Nature ... strokes could be developed by controlling a molecule involved ...
... EU-financed sleep research project is coordinated from FinlandIn ... network was establishedto investigate the causes and implications ... as from the social point of view. This ... effects of sleep restriction" will last for four ...
Cached Biology News:Cord blood cells may widen treatment window for stroke 2Limiting the damage in stroke 2Limiting the damage in stroke 3Do the Europeans turn ill sitting up so late? 2
(Date:9/30/2014)... 30, 2014 CORD:USE Cord Blood Bank – ... it has entered into an Equity and Exclusive Services ... licensed a series of patented technologies for the isolation of ... applications.  Tianhe is performing Phase I/II clinical trials in ... using Tianhe,s Stem Cell Educator Therapy showing ...
(Date:9/30/2014)... (PRWEB) September 30, 2014 ... solutions for drug discovery and related life ... consortium has chosen Genedata Selector as its ... (NGS) data. FUNGITECT is a European consortium ... fungal diseases via individualized anti-fungal drug therapies. ...
(Date:9/30/2014)... , Sept. 30, 2014  KemPharm, Inc., ... discovery and development of proprietary new molecular entity ... Patent and Trademark Office (USPTO) issued U.S. Patent ... entitled, "Benzoic Acid, Benzoic Acid Derivatives and Heteroaryl ... Making and Use Thereof." The patent, ...
(Date:9/30/2014)... , Sept. 30, 2014 FemCap Inc., ... health announces its receipt of a patent No: US, ... cup has also received FDA clearance in the U.S., ... the CE in Europe. This patent is related to its ... this issuance, the company is releasing FemmyCycle Teen, a ...
Breaking Biology Technology:CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 2CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 3CORD:USE is Pleased to Announce it has Partnered with Tianhe Stem Cell Biotechnologies, Developer of Cord Blood Stem Cell Therapy Showing Promising Results in Clinical Trials for the Treatment of Diabetes and Autoimmune Diseases 4FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 2FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 3KemPharm, Inc. Receives Patent from the USPTO for Novel Prodrug of Hydromorphone, KP511 2The FemmyCycle 2
... Researchers performing ... have found that a combination of phenol based , ... array data than either method alone (1-3). ... of RiboPure RNA Isolation Kits are the first kits that combine , ...
... siRNA Expression Cassettes , ... enormous opportunities to study gene silencing. Unfortunately, ... vectors is labor and time intensive. , ... Cassette Kits provide a rapid PCR-based method for preparing , ...
... experiment depends on the efficient delivery of siRNA ... expression vehicles (plasmids, PCR fragments) into cells. Many , ... reagents to deliver these molecules into cultured mammalian , ... of reagent and the conditions under which it , ...
Cached Biology Technology:Improve RNA Isolation for Array Analysis and More 2Improve RNA Isolation for Array Analysis and More 3Improve RNA Isolation for Array Analysis and More 4Improve RNA Isolation for Array Analysis and More 5Improve RNA Isolation for Array Analysis and More 6GENE SILENCING WITH PCR PRODUCTS 2GENE SILENCING WITH PCR PRODUCTS 3GENE SILENCING WITH PCR PRODUCTS 4GENE SILENCING WITH PCR PRODUCTS 5GENE SILENCING WITH PCR PRODUCTS 6GENE SILENCING WITH PCR PRODUCTS 7GENE SILENCING WITH PCR PRODUCTS 8Choose the Right Transfection Agent for Your RNAi Experiment 2Choose the Right Transfection Agent for Your RNAi Experiment 3Choose the Right Transfection Agent for Your RNAi Experiment 4Choose the Right Transfection Agent for Your RNAi Experiment 5Choose the Right Transfection Agent for Your RNAi Experiment 6Choose the Right Transfection Agent for Your RNAi Experiment 7
... units/µL ,• High specific activity and processivity ... 'A' overhang ,• Processes ,A ... activity in primer extension and other molecular ... the enzyme, each lot has been functionally ...
... Recombinant DNA polymerase from Thermus aquaticus ... DNA contamination; 1 tube of 250 units ... LD (Low DNA), is the same enzyme ... purified through a proprietary separation process to ...
Our original highly-purified, robust Taq Polymerase which delivers consistently high yields and minimal background...
Taq DNA polymerase, 10,000U...
Biology Products: