title: Changing blood types.
authors.forename: A P
authors.initials: AP
authors.lastname: Varki
mesh_terms: D000017:ABO Blood-Group System / Q000378:metabolism*; D000118:Acetylglucosaminidase / Q000378:metabolism*; D002240:Carbohydrate Sequence; D006801:Humans; D008969:Molecular Sequence Data; D013296:Streptococcus pneumoniae / Q000201:enzymology
chemical_list: D000017:ABO Blood-Group System; D000118:Acetylglucosaminidase