Abstract:
:Most geckos are nocturnal forms and possess rod retinas, but some diurnal genera have pure-cone retinas. We isolated cDNAs encoding the diurnal gecko opsins, dg1 and dg2, similar to nocturnal gecko P521 and P467, respectively. Despite the large morphological differences between the diurnal and nocturnal gecko photoreceptor types, they express phylogenetically closely related opsins. These results provide molecular evidence for the reverse transmutation, that is, rods of an ancestral nocturnal gecko have backed into cones of diurnal geckos. The amino acid substitution rates of dgl and dg2 are higher than those of P521 and P467, respectively. Changes of behavior regarding photic environment may have contributed to acceleration of amino acid substitutions in the diurnal gecko opsins.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Taniguchi Y,Hisatomi O,Yoshida M,Tokunaga Fdoi
10.1016/s0014-5793(99)00089-7keywords:
subject
Has Abstractpub_date
1999-02-19 00:00:00pages
36-40issue
1eissn
0014-5793issn
1873-3468pii
S0014-5793(99)00089-7journal_volume
445pub_type
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