Navigation Links
Study of skates and sharks questions assumptions about 'essential' genes
Date:12/17/2011

Biologists have long assumed that all jawed vertebrates possess a full complement of nearly identical genes for critical aspects of their development. But a paper in the December 16 issue of Science with Benjamin King of the Mount Desert Island Biological Laboratory (MDIBL) as lead author shows that elasmobranchs, a subclass of cartilaginous fishes, lack a cluster of genes, HoxC, formerly thought to be essential for proper development.

Hox genes dictate the proper patterning of tissues during embryonic development in all bilateral animals, that is, those with a top and a bottom and a back and a front. In fruit flies, mutations in one Hox gene can lead to such miscues as legs growing where antenna should be. In mammals, Hox genes are required for the proper patterning of vertebrae and ribs. Hox genes are notable for being "co-linear," that is, the order they appear in the genome corresponds to the order of their expression in tissues of developing embryos from head to tail.

Fruit flies have one Hox cluster. In all the jawed vertebrates previously studied, scientists always found four copies of the Hox cluster. These clusters, named HoxA, HoxB, HoxC, and HoxD, are present in humans with roughly 10 genes in each cluster (39 in all). Prior to King's study, it was thought that all jawed vertebrates needed at least one gene from each of the four clusters for viable development. However, King and his colleagues call that fundamental assumption into question by offering compelling evidence that at least two elasmobranch fish, the little skate (Leucoraja erinacea) and the dogfish shark (Scyliorhincus canicula), lack the HoxC cluster.

King and his co-authors, Heather Carlisle and Randall Dahn from MDIBL and Andrew Gillis from Cambridge University, used high-throughput sequencing data to characterize all genes expressed in late-stage embryos from three cartilaginous fishes the elephant shark (Callorhincus milii<
'/>"/>

Contact: Ann Cox Halkett
ann.coxhalkett@mdibl.org
207-288-9880 x132
Mount Desert Island Biological Laboratory
Source:Eurekalert

Page: 1 2

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. £2 million study to reveal workings of dementia genes
3. New study looks to define evangelicals and how they affect polling
4. CU-Boulder study suggests air quality regulations miss key pollutants
5. Researchers study acoustic communication in deep-sea fish
6. Study reveals homeowner perceptions in fire-prone areas
7. Researchers study how pistachios may improve heart health
8. Study: urban black bears live fast, die young
9. New study indicates link between weight gains during pregnancy and dieting history
10. Study reveals specific gene in adolescent men with delinquent peers
11. Sweat it out: UH study examines ability of sweat patches to monitor bone loss
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... OAK RIDGE, Tenn., July 11, 2014--Researchers at the ... received eight R&D 100 awards, presented by R&D ... innovations. , "These awards recognize the tremendous ... Energy Ernest Moniz. "Research and development at the ... its energy challenges and pursue the scientific and ...
(Date:7/11/2014)... near the City of Entiat on Tuesday, July 8, ... quickly grew to over 1,000 acres by evening. Three ... under investigation by the Washington Department of Natural Resources. ... resources in developing fire control strategies and tactics. Other ... Department of Natural Resources, (WA DNR), Bureau of Land ...
(Date:7/11/2014)... is creating a new professorship in tissue engineering ... for Molecular Engineering and the Marine Biological Laboratory, ... Millicent and Eugene Bell Foundation., The Eugene Bell ... Institute for Molecular Engineering. That endowed chair holder ... MBL,s Eugene Bell Center for Regenerative Biology and ...
Breaking Biology News(10 mins):ORNL wins eight R&D 100s 2ORNL wins eight R&D 100s 3ORNL wins eight R&D 100s 4New professorship in tissue engineering links molecular engineering, marine biology 2
... the atmosphere through summer thunderstorm clouds, according to a ... Letters . How much the warming effect of these ... not yet clear. To find out, researchers need to ... Pollution strengthens thunderstorm clouds, causing their anvil-shaped tops ...
... rate at which the rabies virus evolves in bats may ... to researchers at the University of Georgia, the U.S. Centers ... Belgium. Their study, published May 17 in the journal ... the most accurate predictor of the viral rate of evolution. ...
... physicists and University of Miami biologists addresses an ... do living cells figure out when and where ... Dimitrios Vavylonis and Associate Professor Fulvia Verde discovered ... a ballet of proteins that change its polarity. ...
Cached Biology News:Pollution teams with thunderclouds to warm atmosphere 2Pollution teams with thunderclouds to warm atmosphere 3Hitting snooze on the molecular clock: Rabies evolves slower in hibernating bats 2Hitting snooze on the molecular clock: Rabies evolves slower in hibernating bats 3A cell's first steps: Building a model to explain how cells grow 2
(Date:7/11/2014)... 2014 /CNW/ - Sunovion Pharmaceuticals Canada Inc. (Sunovion) today ... acetate) for use as a once-daily adjunctive therapy for ... who are not satisfactorily controlled with conventional therapy.  APTIOM ... under 18 years of age. Epilepsy ... according to Epilepsy Canada, it affects 0.6% of the ...
(Date:7/10/2014)... 2014 Deep Knowledge Ventures last ... on ‘Commercialising Longevity Research’ and welcomed a host ... London Bioscience Innovation Center for the event, organised ... Analytics Ltd. The meeting highlighted the need for ... for age-related disease, as well as the crucial ...
(Date:7/10/2014)... OMICS Group’s 5th International conference and ... 2014 at Double Tree by Hilton Beijing, China is ... Analytical & Bioanalytical research methods only to facilitate improved ... occasion, Dr. Srinubabu Gedela, MD of OMICS Group Inc ... remarkable one in bringing a unique and international mix ...
(Date:7/10/2014)... , July 10, 2014  Kainos Capital, a ... brands, today announced that it has acquired the Slim-Fast ... in the business. Terms of the transaction were not ... and meal replacement business that markets ready-to-drink shakes, powders, ... North America and in the ...
Breaking Biology Technology:Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 2Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 3Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6A Critical Review of Analytical Techniques for Improved Living Standards 2A Critical Review of Analytical Techniques for Improved Living Standards 3A Critical Review of Analytical Techniques for Improved Living Standards 4Kainos Capital Acquires Slim-Fast From Unilever 2
... recommend Corvalen(R) D-Ribose to boost cellular energy, NEW YORK, ... you,could sleep all year and not catch up? That,s how ... there was a good reason to be,exhausted -- five boys ... fix., Then came a sixth son, and she began ...
... System Combines Clinical Benefits of Dual Wavelengths Through ... Time While Providing a Uniform, Safe and Effective ... Treatment - New Offering Signals Company,s Expansion into International Laser ... Lipolysis Market, WESTFORD, Mass., April 28 Cynosure, ...
... Calif., April 28 Aida,Pharmaceuticals, Inc. (OTC Bulletin Board: ... its Phase 2 testing results of Rh-Apo2L and,expects to ... announced that the target cancers for the drug have ... targets,that the Company has chosen are ailments which Rh-Apo2L ...
Cached Biology Technology:D-Ribose Helps Energy-Starved Hearts 2Cynosure Introduces Smartlipo MPX(TM) Dual Wavelength Workstation for LaserBodySculpting(SM) 2Cynosure Introduces Smartlipo MPX(TM) Dual Wavelength Workstation for LaserBodySculpting(SM) 3Cynosure Introduces Smartlipo MPX(TM) Dual Wavelength Workstation for LaserBodySculpting(SM) 4Cynosure Introduces Smartlipo MPX(TM) Dual Wavelength Workstation for LaserBodySculpting(SM) 5Aida Pharmaceuticals, Inc. Announces Update on Progress of Rh-Apo2L Testing 2
TMB Slow Kinetic One Component HRP Microwell Substrate, 1 L...
Request Info...
... Alkaline Phosphatase, Calf Intestinal (CIAP), catalyzes the ... and ribo- and deoxyribonucleoside triphosphates. This enzyme ... of linearized cloning vector DNA by removing ... also be used for the dephosphorylation of ...
100 adhesive strips....
Biology Products: