title: Mixed agglutination on solid phase (MASP) and its inhibition (IMASP): two immunoassays for soluble ABH group-specific substances.
abstract: Two immunoassays are described: mixed agglutination on solid phase (MASP) and inhibition of mixed agglutination on solid phase (IMASP). The MASP assay permits detection and measurement of soluble A, B and H high molecular weight glycoproteins in secretor individuals with a sensitivity at least 800 times greater than the usual inhibition technique. Both secretors and non-secretors can be typed by the less sensitive IMASP test which also permits the detection of low molecular weight A, B and H substances.
mesh_terms: D000017:ABO Blood-Group System; D000372:Agglutination Tests; D002448:Cell Adhesion; D006801:Humans; D007106:Immune Sera / Q000494:pharmacology; D007118:Immunoassay; D007185:Incubators; D012463:Saliva / Q000276:immunology; D012995:Solubility
chemical_list: D000017:ABO Blood-Group System; D007106:Immune Sera