SIGNAL TRANSFER FROM RHODOPSIN-LIKE PROTE IN UNDER CHLAMYDOMONAS-REINHARDTII PHOTOTAXIS - SIMILARITIES WITH AND DISTINCTIONS FROM MAMMALIANPHOTORECEPTORS

The data on the rhodopsin-like protein (RLP) of the flagellate chlamid omonads and our earlier obtained materials concerning GTP-binding prot eins of these protozoans are summarized. New facts about the interacti on of the mammalian photoreceptor transducin with the chlamidomonad RL P containing not only 11-cis-, but also trans-form of the retinal, are presented. Using a spectially constructed device allowing one to eval uate separately the cell chaotic movements and their phototaxis, it ha s been shown that dibutyryl cAMP and neomycin do nof affect the latter process.