title: A simple method for the standardization of proteolytic enzymes used in blood group serology.
mesh_terms: D001789:Blood Group Antigens; D010447:Peptide Hydrolases / Q000378:metabolism / Q000592:standards*; D012699:Serology / Q000592:standards; D013053:Spectrophotometry / Q000379:methods
chemical_list: D001789:Blood Group Antigens; D010447:Peptide Hydrolases