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Old 10-30-2012, 05:18 PM
 
Location: Toronto, Canada
1,433 posts, read 1,155,846 times
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ScienceDaily (Oct. 29, 2012) ó Opsins, the light-sensitive proteins key to vision, may have evolved earlier and undergone fewer genetic changes than previously believed, according to a new study from the National University of Ireland Maynooth and the University of Bristol published October 29 in Proceedings of the National Academy of Sciences (PNAS) .


The study, which used computer modelling to provide a detailed picture of how and when opsins evolved, sheds light on the origin of sight in animals, including humans. The evolutionary origins of vision remain hotly debated, partly due to inconsistent reports of phylogenetic relationships among the earliest opsin-possessing animals.


New study sheds light on how and when vision evolved
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