Accessibility of the iodopsin chromophore.
Biochim Biophys Acta
; 404(2): 300-8, 1975 Oct 09.
Article
en En
| MEDLINE
| ID: mdl-1182163
ABSTRACT
Iodopsin can replace its chromophore (11-cis retinal) by added 9-cis retinal, resulting in the formation of isoiodopsin. NaBH4 bleaches iodopsin in the dark. In a relatively low concentration of digitonin, the scotopsin (the protein moiety of chicken rhodopsin) removes 11-cis retinal from iodopsin in the dark. These facts suggest that the linkage of the chromophore to opsin in the iodopsin molecule (presumably a Schiff-base linkage) is accessible to these reagents, which is different from the situation in rhodopsin.
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Banco de datos:
MEDLINE
Asunto principal:
Pigmentos Retinianos
/
Yodoproteínas
Límite:
Animals
Idioma:
En
Año:
1975
Tipo del documento:
Article