ID 3.4.24.57 DE O-sialoglycoprotein endopeptidase. AN glycoprotease. CA Hydrolysis of O-sialoglycoproteins. Cleaves 31-Arg-|-Asp-32 bond in CA glycophorin A. Does not cleave unglycosylated proteins, desialylated CA glycoproteins or glycoproteins that are only N-glycosylated. CC -!- Inhibited by EDTA (100 mM) and 1,10-phenanthroline. CC -!- Belongs to peptidase family M22. //