Multiple genes permit closely related fish species to mix and match their color vision
...r vision in these cichlids. They have measured the sensitivities of the cones to different wavelengths of light and...igment proteins. The seven cone types have maximum sensitivities ranging from the red end of the spectrum right through to the ultraviolet--light outside the range o...Evolution of taste receptor may have shaped human sensitivity to toxic compounds
...atural selection has played in forming our present sensitivities and protecting us from harmful natural chemicals. The research team analyzed the nucleotide sequence of a human gene encoding a bitter-taste receptor that mediates recognition of a class of naturally ubiquitous, but toxic, cyanide-releasing compounds...