Navigation Links
Fish vision discovery makes waves in natural selection

heoretical computation to compare vision proteins and pigments from scabbardfish and another species, lampfish. The results indicated that scabbardfish shifted from UV to violet vision by deleting the molecule at site 86 in the chain of amino acids in the opsin protein.

"Normally, amino acid changes cause small structure changes, but in this case, a critical amino acid was deleted," Yokoyama says.

More examples likely

"The finding implies that we can find more examples of a similar switch to violet vision in different fish lineages," he adds. "Comparing violet and UV pigments in fish living in different habitats will open an unprecedented opportunity to clarify the molecular basis of phenotypic adaptations, along with the genetics of UV and violet vision."

Scabbardfish spend much of their life at depths of 25 to 100 meters, where UV light is less intense than violet light, which could explain why they made the vision shift, Yokoyama theorizes. Lampfish also spend much of their time in deep water. But they may have retained UV vision because they feed near the surface at twilight on tiny, translucent crustaceans that are easier to see in UV light.

A framework for evolutionary biology

Last year, Yokoyama and collaborators completed a comprehensive project to track changes in the dim-light vision protein opsin in nine fish species, chameleons, dolphins and elephants, as the animals spread into new environments and diversified over time. The researchers found that adaptive changes occur by a small number of amino acid substitutions, but most substitutions do not lead to functional changes.

Their results provided a reference framework for further research, and helped bring to light the limitations of studies that rely on statistical analysis of gene sequences alone to identify adaptive mutations in proteins.

"Evolutionary biology is filled with arguments that are misleading, at best

Contact: Beverly Clark
Emory University

Page: 1 2 3

Related biology news :

1. Television has less effect on education about climate change than other forms of media
2. Visionary concept earns La Jolla Institute scientist prestigious NIH Pioneer Award
3. AAAS Pacific division scientific conference to meet in San Francisco Aug. 14 - 19
4. LSUHSCs Bazan awarded ARRA grant to preserve vision
5. Medical use for waste television screens
6. The Vision Revolution: Eyes are the source of human superpowers
7. Protein that triggers plant cell division revealed by researchers
8. Slicing chromosomes leads to new insights into cell division
9. Study may aid efforts to prevent uncontrolled cell division in cancer
10. Brain building: Study shows brain growth tied to cell division in mouse embryos
11. New models question old assumptions about how many molecules it takes to control cell division
Post Your Comments:
Related Image:
Fish vision discovery makes waves in natural selection
(Date:9/15/2014)... tip the balance between ridding the body of a ... a report appearing in The Journal of ... viruses cause chronic infections in roughly three-quarters of infected ... diseases including cirrhosis and cancer. A few patients successfully ... CD8 + T cells. The protective effects of ...
(Date:9/15/2014)... reports about the need for vitamin E and how ... that adequate levels of this essential micronutrient are especially ... who are or may become pregnant. , A lifelong ... said, but often complicated by the fact that this ... through diet alone. It has been estimated that only ...
(Date:9/15/2014)... , Sept. 15, 2014  GENiSYSS, a ... , announces the public launch of their ... unique, patented product, combining room temperature, long-term storage ... only company to make personal storage of DNA ... -   Photo - ...
Breaking Biology News(10 mins):Vitamin E intake critical during 'the first 1,000 days' 2Vitamin E intake critical during 'the first 1,000 days' 3GENiSYSS Launches Website about Easy, Inexpensive Home DNA Storage for Everyone 2
... PhD, chair of NJIT,s Department of Engineering Technology, has ... Engineering Education (ASEE). Rockland, of Parsippany, will receive ... June in Canada. Rockland,s career began in 1970 ... Beth Israel Medical Center. Since then he has ...
... -- Fables have long cast scorpions as bad-natured killers of ... Michigan State University scientists, however, see them in a different ... the effects of scorpion venom with the hopes of finding ... are published in the current issue of the Journal ...
... courtship antics likely influence their success at attracting and ... Roz Dakin and Robert Montgomerie have found that ... peacock,s tail does not impact a male,s mating success. ... the number of eyespots are less successful at mating. ...
Cached Biology News:Engineering education society names NJIT professor Fellow 2For peacocks, the eyespots don't lie 2
(Date:9/12/2014)... of a magnet using an electric field (magnetoelectric ... of the next-generation technology for information processing and ... MEM effect, due to the coexistence of electric ... coexistence of spontaneous electric and magnetic polarizations is ... potential of the MEM effect. This article briefly ...
(Date:9/12/2014)... Advancing the front lines of research ... biological threats is the mission of an international ... and the Georgian National Academy of Sciences, and ... Security Programme of the North Atlantic Treaty Organization ... series, the event is titled “Nanotechnology to Aid ...
(Date:9/12/2014)... View, CA (PRWEB) September 12, 2014 ... fundraising campaign on Indiegogo. , The film, directed ... Hawking, Buzz Aldrin, Shimon Peres, Ashton Kutcher, Will.i.Am, Michio ... the world and there’s only one university in the ... to help change the lives of a billion people: ...
(Date:9/12/2014)... Sandia Biotech, Inc. announced today that the company ... for a technology developed by researchers at the University ... Queen Mary University of London in London, England. ... Technology Platform (RFAP) was developed by Dr. Ravi Durvasula ... Kang from Queen Mary’s Department of Molecular Cell Biology, ...
Breaking Biology Technology:Worcester Polytechnic Institute to Lead Scientific Workshop on Nanoscale Defenses for Biological and Chemical Threats 2Worcester Polytechnic Institute to Lead Scientific Workshop on Nanoscale Defenses for Biological and Chemical Threats 3Documentary Film that Follows Singularity University Students as They Change the World Launches its IndieGoGo Fundraising Campaign 2Sandia Biotech and STC.UNM Announce Option Agreement to License Novel Recombinant Antibody Technology 2Sandia Biotech and STC.UNM Announce Option Agreement to License Novel Recombinant Antibody Technology 3Sandia Biotech and STC.UNM Announce Option Agreement to License Novel Recombinant Antibody Technology 4
... May 21 Oncolab, Inc.,s AMAS(R) Test,( ... may,allow early detection of a wide range of ... Anti-malignin antibody, in human,serum., Anti-malignin is a ... to,increase with age, as the risk of cancer ...
... ERES ), a leading provider of centralized,electrocardiographic ... Michael J. McKelvey, the Company,s President and,Chief Executive ... are scheduled to present at the FBR 12th ... May 28, 2008 at the Grand Hyatt Hotel ...
... Calif., May 20 NASA has,developed a revolutionary ... bacteria, viruses and parasites. This biosensor,will be used ... biohazards in,water, food and other contaminated sources., ... California licensed the,biosensor technology to Early Warning Inc., ...
Cached Biology Technology:eResearchTechnology to Present at the FBR 12th Annual Spring Investor Conference on May 28th 2008 2NASA Nanotechnology-Based Biosensor Helps Detect Biohazards 2
Request Info...
... polyacrylamide gel electrophoresis (2D-PAGE) with biological mass ... technology platform for proteomic analysis. 2D-PAGE gels ... limited only in the dynamic range and ... Quantitative image based analysis of separated proteins ...
... DNA Polymerase is ideal for high-fidelity ... applications such as cloning and mutagenesis. ... a proprietary enzyme preparation containing recombinant ... proofreading (3'Cut Site5' exonuclease) activity. ...
... N-term Antibody This antibody is generated from ... peptide selected within aa 50~150 of human ... PBS with 0.09% (W/V) sodium azide. This ... column and eluted out with both high ...
Biology Products: