OBSOLETE. Hydrophobic glycoprotein to which 11-cis-retinal binds as a Schiff base (in rhodopsin) or 3,4-didehydro-11-cis-retinal binds as a Schiff base in cyanopsin and porphyropsin.
Source:ISBN:0198547684
Comment
This term was made obsolete because it refers to a class of proteins.