Navigation Links
Does missing gene point to nocturnal existence for early mammals?

A gene that makes cells in the eye receptive to light is missing in humans, researchers have discovered.

They say that whereas some animals like birds, fish and amphibians have two versions of this photoreceptor, mammals, including humans, only have one.

The findings ?published in the Public Library of Science journal PLoS Biology ?reveal how our experience of the light environment may be impoverished compared to other vertebrates and fits with the suggestion that early mammals were at one time wholly nocturnal creatures.

"The classical view of how the eye sees is through photoreceptive cells in the retina called rods and cones," explained Dr Jim Bellingham, who led the research at The University of Manchester.

"But, recently, a third photoreceptor was discovered that is activated by a gene called melanopsin. This melanopsin photoreceptor is not linked to sight but uses light for non-visual processes, such as regulating our day-night rhythms and pupil constriction."

Although the melanopsin gene is present in all vertebrates, the version in mammals was unusually different to that found in fish, amphibians and birds.

"At first, we put this genetic anomaly between mammals and other vertebrates down to evolutionary differences," said Dr Bellingham, who is based in the Faculty of Life Sciences.

"But we have now learnt that other vertebrates have a second melanopsin gene ?one that matches the one found earlier in mammals and humans. The first melanopsin gene found in the other classes of vertebrates does not exist in mammals."

It is not yet clear how the functions of the two melanopsins differ but having different cone genes or 'opsins' allows vertebrates to detect different wavelengths of light and allows them to see colour.

The Manchester team now hopes to find out whether the two melanopsin genes in non-mammals play similar or different roles in non-visual light detection and so prov
'"/>

Source:University of Manchester


Page: 1 2

Related biology news :

1. Scientists find missing enzyme for tuberculosis iron scavenging pathway
2. Researchers find missing genes of ancient organism
3. Sinkers provide missing piece in deep-sea puzzle
4. Hepatitis B accounts for 40 percent of missing Asian women
5. South Pacific plant may be missing link in evolution of flowering plants
6. While on trail of dioxin, scientists pinpoint cancer target of green tea
7. Pinpointing the cause of a neurodegenerative disorder
8. Pinpointing a culprit molecule in Alzheimers disease
9. Scientists crack 40-year-old DNA puzzle and point to hot soup at the origin of life
10. Scientists pinpoint inflammation gene
11. New study pinpoints epicenters of Earths imminent extinctions
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Does missing gene point nocturnal existence for early mammals

(Date:8/21/2014)... Aug. 21, 2014 Nxt-ID, Inc. (OTCQB: NXTD), ... commerce market, announced today that its shares of common ... be issued in its proposed underwritten public offering of ... on The Nasdaq Capital Market, subject to closing of ... and warrants, and will trade under the symbol "NXTD" ...
(Date:8/21/2014)... ubiquitous skin fungus linked to dandruff, eczema and other ... to even further global reachesincluding Hawaiian coral reefs and ... vents. , A review in the scientific journal ... of the fungi of the genus Malassezia ... sequencing datasets from around the world. , University of ...
(Date:8/21/2014)... -- Nine researchers from Beth Israel Deaconess ... in "The World,s Most Influential Scientific Minds 2014," ... Thomson Reuters ScienceWatch, a web resource for science metrics ... recognized as among the most influential "are performing and ... the advancement of their science," according to a Thomson ...
Breaking Biology News(10 mins):Nxt-ID Approved for NASDAQ Capital Market Listing 2Nxt-ID Approved for NASDAQ Capital Market Listing 3From dandruff to deep sea vents, an ecologically hyper-diverse fungus 2BIDMC researchers named among 'the most influential scientific minds' 2BIDMC researchers named among 'the most influential scientific minds' 3
... commercially available mineral waters, the researchers found evidence of ... the water. What,s more, these chemicals are potent in ... in the New Zealand mud snail. These findings, which ... of plastic food packaging materials act as functional estrogens, ...
... diseases that can travel with the wind have the ... understood, according to a new study, in findings that ... but also a new fungus that threatens global wheat ... State University and other institutions, concluded that invading diseases ...
... is available in Spanish . , ... of psychosis and schizophrenia, and those episodes of psychosis ... characteristics, both before their appearance and in the clinical ... conclusions of the doctoral thesis "Neurodevelopment and environmental stress ...
Cached Biology News:Hormone-mimics in plastic water bottles -- just the tip of the iceberg? 2New wheat disease could spread faster than expected 2New wheat disease could spread faster than expected 3Daily consumption of cannabis predisposes to the appearance of psychosis and schizophrenia 2
(Date:8/22/2014)... New York (PRWEB) August 22, 2014 ... one of the interesting and challenging endeavors as ... renders highly impervious properties to the foreign substances. ... as possibility of self medication and minimal use ... low molecular weight drugs and provides specific targeting ...
(Date:8/22/2014)... 2014 The AMA is pleased to ... in Alaska that Alaska Governor Sean Parnell has signed ... defining public use of Unmanned Aircraft Systems and the ... Bill 255states that it is, “An Act relating to ... an unmanned aircraft system.” It defines State of Alaska ...
(Date:8/21/2014)... Aug. 21, 2014  BioSpecifics Technologies Corp. (NASDAQ: ... first in class collagenase-based products marketed as XIAFLEX ... the U.S. and XIAPEX ® in the ... a randomized, double-blind Phase 2a study of CCH ... fibrosclerotic panniculopathy. The results showed that all three ...
(Date:8/21/2014)... 21, 2014 2014 Deep ... is a professional and in-depth research report ... provides basic Seaweed Fertilizer information, including Seaweed ... structure as well as industry overview. This ... domestic market as well as global industry ...
Breaking Biology Technology:Ocular Drug Delivery Technologies Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 2Ocular Drug Delivery Technologies Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 3Ocular Drug Delivery Technologies Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2014 - 2020 4State of Alaska Signs Unmanned Aircraft Systems Bill 2BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 2BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 3BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 4BioSpecifics Technologies Corp. Announces Positive Data from Phase 2a Study of CCH for Treatment of Cellulite 5Internationals Seaweed Fertilizer Industry 2014 Development Trend Analysis in New Research Study at DeepResearchReports.com 2Internationals Seaweed Fertilizer Industry 2014 Development Trend Analysis in New Research Study at DeepResearchReports.com 3
... of decorative, flower-like defects in the nanomaterial graphene could ... electrical and mechanical properties, according to researchers at the ... Tech. In a new paper,* the team for the ... could occur naturally or be induced to occur in ...
... of the March 11 earthquake and rolling blackouts that ... award-winning undergraduate internship program NanoJapan is scrambling to run ... U.S. undergraduates travel to Japan for lab internships, NanoJapan ... send 25-30 students to Rice University laboratories for three ...
... May 25, 2011 Anadys Pharmaceuticals, Inc. (Nasdaq: ... the treatment of hepatitis C, announced today that it will ... the Company,s oral immuno-modulator that acts via the TLR-7 pathway, ... Meeting in Chicago, IL.  The data from the completed Phase ...
Cached Biology Technology:Defect in graphene may present bouquet of possibilities 2Reverse NanoJapan: Rice to host 25-30 Japanese students 2Anadys Highlights ANA773 Data to be Presented at ASCO 2Anadys Highlights ANA773 Data to be Presented at ASCO 3Anadys Highlights ANA773 Data to be Presented at ASCO 4
... The CHEMICON APO-BRDU Kit is ... labeling DNA breaks and total cellular DNA ... The kit contains the instructions and ... including; positive and negative control cells for ...
... overlay agarose, is a low melting point ... to secure IPG strips in place for ... incorporated to allow monitoring of electrophoresis runs. ... melting point agarose in 1x Tris, glycine, ...
... cell is an apparatus dedicated to general ... agarose slab gels. The cell includes the ... tray, 5 glass plates, 50 sheets of ... templates, and instructions. Dimensions are 21 x ...
... range of next-generation features into a small-footprint ... for flexible laboratory solutions. It puts every ... dilution, dispensing, and integrations into a ... flexible as it is efficient and economical. ...
Biology Products: