Vertebrate Photoreceptors

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 measurements of single photoreceptor cells, on the kinds of photoreceptor cascade enzymes, and on the electrophysiological...

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Bibliographic Details
Published in:Progress in retinal and eye research 2001, Vol.20 (1), p.49-94
Main Authors: Ebrey, Thomas, Koutalos, Yiannis
Format: Article
Language:English
Subjects:
Adaptation, Ocular
Amino Acid Sequence
Animals
Calcium - metabolism
Cyclic GMP - metabolism
Electrophysiology
Humans
Molecular Sequence Data
Photoreceptor Cells, Vertebrate - classification
Photoreceptor Cells, Vertebrate - cytology
Photoreceptor Cells, Vertebrate - physiology
Retinal Pigments - chemistry
Retinal Pigments - physiology
Sequence Homology, Amino Acid
Vision, Ocular - physiology
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Summary: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 measurements of single photoreceptor cells, on the kinds of photoreceptor cascade enzymes, and on the electrophysiological properties of photoreceptors. The implications of the existence of five distinct visual pigment families are explored, especially with regard to what pigments are in what types of photoreceptors, if there are different phototransduction enzymes associated with different types of photoreceptors, and if there are electrophysiological differences between different types of cones.
ISSN:1350-9462
1873-1635
DOI:10.1016/S1350-9462(00)00014-8