galactose residues of desialo-fetuin and lysozyme-lactose are sialylated by all four sialytransferases tested , galactose bound to lysozyme via a phenylazo group is inactive with the enzyme from bovine submandibular gland , and galactose bound directly to lysozyme serves as substrate only for the frog liver sialytransferase .
C0002210
fetuin
C0023884
liver