Journal
FEBS LETTERS
Volume 501, Issue 2-3, Pages 151-155Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0014-5793(01)02632-1
Keywords
opsin; green rod; Amphibia; in situ hybridization; immunohistochemistry; Japanese common newt (Cynops pyrrhogaster)
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Previously, we reported that an opsin (Rc-MS) belonging to the SWS2 group opsins is expressed in bullfrog green rods [Hisatomi, O. et al., FEBS Lett., 1999, 447, 44-48]. An anti-Rc-MS antiserum recognized the cones of the Japanese common newt, Cynops pyrrhogaster, which has no green rods. We isolated a cDNA encoding an SWS2 group opsin (Cp-SWS2) from this newt and found that Cp-SWS2 is expressed in a small population of the cones. Our results suggest that SWS2 opsins can be expressed in either green rods or cones of caudata. It seems reasonable to suppose that green rods arose before amphibia were divided into caudata and anura. (C) 2001 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved.
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