Two visual pigment opsins,one expressed in the dorsal region and another in the dorsal and ventral regions,of the compound eye of a dragonfly,Sympetrum frequens |
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| Authors: | Kentaro Arikawa Koichi Ozaki Takanari Tsuda Junko Kitamoto Yuji Mishina |
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| Institution: | (1) Department of Biology, Yokohama City University, 236 Yokohama, Japan;(2) Department of Biology, Faculty of Science, Osaka University, Toyonaka, 560 Osaka, Japan;(3) Kihara Institute for Biological Research, Yokohama City University, 236 Yokohama, Japan;(4) Present address: MD Anderson Cancer Center, University of Texas, 77030 Houston, TX, USA |
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| Abstract: | This paper describes the primary structure of two visual pigment opsins (DfRh1 and DfRh2) in the regionalized compound eye
of a dragonfly,Sympetrum frequens. The amino acid sequences were deduced from the nucleotide sequences of cDNAs isolated from a cDNA library of the dragonfly
retina. The two opsins both consist of 379 amino acids with 81.3% identity. Analysis of hydropathy indicated that the sequences
have seven transmembrane domains like those of previously described opsins. Expression analysis using RT-PCR revealed that
DfRh1 was present only in the dorsal region whereas DfRh2 was detected in both the dorsal and the ventral regions of the eye. |
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| Keywords: | rhodopsin opsin photoreceptor retina dragonfly (Sympetrum frequens) Drosophila |
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