alpha-N-acetylgalactosidase (EC 3.2.1.4) is a highly specific exoglycosidase capable of effectively hydrolyzing alpha-N-acetylgalactosamine (GalNAc) linked to serine or threonine residues in glycoproteins (Tn antigen). This enzyme demonstrates activity towards terminal GalNAc in alpha 1-3 linkages and operates optimally within a pH range of 6.0-7.6, without requiring cofactors or specialized buffer systems.
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