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  • Title: Cyclic nucleotides and GTP analogues stimulate light-induced phosphorylation of octopus rhodopsin.
    Author: Tsuda M, Tsuda T, Hirata H.
    Journal: FEBS Lett; 1989 Oct 23; 257(1):38-40. PubMed ID: 2553493.
    Abstract:
    Light-induced phosphorylation of octopus rhodopsin in microvillar membrane was shown to be stimulated by cyclic nucleotides in contrast to vertebrate rhodopsin kinase. Non-hydrolyzable GTP analogues, GTP lambda S and GppNHp, greatly enhanced the light-induced phosphorylation of octopus rhodopsin, but the non-hydrolyzable GDP analogue, GDP beta S, was not effective. These results suggest that rhodopsin A-kinase is involved in regulating the interaction between rhodopsin and G-protein in octopus photoreceptors.
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