1. An oft-cited view, derived principally from the writings of Gordon L. Walls, is that relatively
few mammalian species have a capacity for colour vision. This review has evaluated that …

Phototransduction is the process by which absorbed light is converted into an electrical
signal in retinal photoreceptors. The'cyclic GMP cascade'is now widely accepted as the …

Absorbance spectra were recorded by microspectrophotometry from 39 different rod and
cone types representing amphibians, reptiles, and fishes, with A1-or A2-based visual …

The basis of the duplex theory of vision is examined in view of the dazzling array of data on
visual pigment sequences and the pigments they form, on the microspectrophotometry …

Synaptic interactions to extract information about wavelength, and thus color, begin in the
vertebrate retina with three classes of light-sensitive cells: rod photoreceptors at low light …

This review outlines how eyes of terrestrial vertebrates and insects meet the competing
requirements of coding both spatial and spectral information. There is no unique solution to …

1. Visual transduction in macaque cones was studied by measuring the membrane current
of single outer segments projecting from small pieces of retina. 2. The response to a brief …

A subset of retinal ganglion cells has recently been discovered to be intrinsically
photosensitive, with melanopsin as the pigment. These cells project primarily to brain …

The rod outer segment phototransduction GAP (GTPase-accelerating protein) has been
identified as RGS9, a member of the RGS family of Gα GAPs. RGS9 mRNA expression is …

Light produces a graded hyperpolarization in retinal photoreceptors, that decreases their
release of synaptic neurotransmitter,. Cone photoreceptors use glutamate, as a …