title: Serum agglutinators in families with twins.
mesh_terms: D000293:Adolescent; D000888:Antibodies, Anti-Idiotypic; D001789:Blood Group Antigens; D001963:Bromelains; D002648:Child; D002675:Child, Preschool; D002918:Chymotrypsin; D010450:Endopeptidases; D005260:Female; D005826:Genetics, Medical; D006384:Hemagglutination; D006801:Humans; D007125:Immunogenetics; D007074:Immunoglobulin G; D008297:Male; D010196:Pancreatic Elastase; D010434:Pepsin A; D010447:Peptide Hydrolases; D012204:Rh-Hr Blood-Group System; D014357:Trypsin
chemical_list: D000888:Antibodies, Anti-Idiotypic; D001789:Blood Group Antigens; D007074:Immunoglobulin G; D012204:Rh-Hr Blood-Group System; D001963:Bromelains; D010450:Endopeptidases; D010447:Peptide Hydrolases; D002918:Chymotrypsin; D010196:Pancreatic Elastase; D014357:Trypsin; D010434:Pepsin A