using 13-day chick brain as a source of uridine diphospho-n-acetyl-d-galactosamine : ganglioside gm3 n-acetylgalactosaminyltransferase ( ganglioside gm2 synthetase ) , we were able to accurately measure transfer of n- [ 3h ] acetylgalactosamine ( galnac ) from udp- [ 3h ] galnac to gm3 by application of the reaction mixture to small columns of deae-sepharose and elution of radiolabeled gm2 reaction product with 10 mm potassium acetate in methanol .
C0016943
galactosamine
C0001055
acetylgalactosamine