IDENTIFICATION AND OLIGOSACCHARIDE STRUCTURE-ANALYSIS OF RHODOPSIN GLYCOFORMS CONTAINING GALACTOSE AND SIALIC-ACID - DUFFIN,KL; LANGE,GW; WELPLY,JK; FLORMAN,R; OBRIEN,PJ; DELL,A; REASON,AJ; MORRIS,HR; FLIESLER,SJ (GLYCOBIOLOGY, 1993)