title: On the possible relation of sialic acid to the Rh factor.
mesh_terms: D002918:Chymotrypsin / Q000494:pharmacology; D004912:Erythrocytes; D066298:In Vitro Techniques; D009438:Neuraminic Acids; D009439:Neuraminidase / Q000494:pharmacology; D010206:Papain / Q000494:pharmacology; D012204:Rh-Hr Blood-Group System
chemical_list: D009438:Neuraminic Acids; D012204:Rh-Hr Blood-Group System; D009439:Neuraminidase; D002918:Chymotrypsin; D010206:Papain