Source:http://linkedlifedata.com/resource/umls/id/C1152658
GO: 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. [ISBN:0198547684]