|Publication Type:||Journal Article|
|Year of Publication:||1992|
|Authors:||Y. Kito, Partridge, J. C., Seidou, M., Narita, K., Hamanaka, T., Michinomae, M., Sekiya, N., Yoshihara, K.|
|Type of Article:||Article|
|Keywords:||4-HYDROXYRETINAL, ANALOG, BIOLUMINESCENT SQUID, chromophore, eye, membrane, META-RHODOPSIN, retinal, RETINALS, rhodopsin, visual pigment, WATASENIA-SCINTILLANS|
The firefly squid, Watasenia scintillans, is the only animal known to possess a visual pigment in which the chromophore is 4-hydroxyretinal. This paper describes the absorbance spectrum and some properties of a synthetic "A4" visual pigment generated from bovine opsin and 4-hydroxyretinal. The absorbance spectrum of this pigment is compared with (a) bovine rhodopsin and (b) a rhodopsin template with the same lambda-max as the synthetic visual pigment. The A4 pigment is shown to have an absorbance spectrum that is almost identical to that of a rhodopsin template. It is also shown that the photosensitivity and thermal stability of the A4 pigment, dispersed in detergent micelles, is essentially similar to that of rhodopsin.
|Alternate Journal:||Vision Res.|