Journal
VISION RESEARCH
Volume 43, Issue 28, Pages 3045-3053Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.visres.2003.09.012
Keywords
visual cycle; photoisomerase; ascidian; retinal; opsin
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The visual cycle system in a primitive chordate, ascidian Ciona intestinalis, was studied by whole-mount in situ hybridization and by whole-mount immunohistochemistry. Three visual cycle proteins, Ciona homologue of RGR (Ci-opsin3), CRALBP (Ci-CRALBP), and BCO/RPE65 (Ci-BCO/RPE65) were widely distributed in the brain vesicle and visceral ganglion. To identify the visual cycle system in a primitive chordate, we compared the localization of photoreceptor-specific proteins (visual pigment and arrestin) and visual cycle proteins (Ci-opsin3 and Ci-CRALBP). The ascidian visual cycle is composed of two cellular compartments. the photoreceptors and the brain vesicle, but some photoreceptor cells also contain visual cycle proteins. (C) 2003 Elsevier Ltd. All rights reserved.
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