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Reticular Specializations in Photoreceptors: a Review
Author(s) -
Whittle Andy C.
Publication year - 1976
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1111/j.1463-6409.1976.tb00699.x
Subject(s) - biology , paracrystalline , reticular connective tissue , opsin , anatomy , zoology , rhodopsin , botany , chemistry , retinal , crystallography
Whittle, A. C.(Department of Zoology, The University, Newcastle upon Tyne, NE1 7RU, UK). Reticular specializations in pholoreceptors: a review . Zool. Scr. 5 (5): 191–206, 1976.—Photoreceptors synthesize opsins which form either stable or unstable metarhodopsins. In the former case reticular specializations are located in the sensory cell (cones and microvillar types) whereas in the latter (rods) they are found in the supporting cells. The specialized reticulum takes various forms; myeloid; paracrystalline; vesicular and submicrovillar; and probably serves as a storage site for vitamin A compounds. In some invertebrates they are implicated in regeneration of visual pigment, whereas in vertebrates they are involved in vitamin A 1 /A 2 interconversion—each process being mediated by an associated opsin‐like substance.