... 2003 Retinol-binding protein in butterfly eye (Eur. J. Biochem. 270) 2445 A novel retinol-binding protein in the retina of the swallowtail butterfly, Papilio xuthus Motohiro Wakakuwa1, Kentaro Arikawa1and ... proximal portion,by light adaptation of the eye. Light adaptation alsoinduced the decrease of all-trans isomer both in the distaland proximal portions of the retina. In contrast, the increase of ... environment of plasma and cytoplasm, and allowregeneration of visual pigments. Here, we identified a novel retinol-binding protein in the eye of a butterfly, Papilio xuthus. The protein that we term Papilio...