Specificity:Recognizes the human Blood Group ABH Antigen. Does not react with group B and 0. Reacts with A and H with chain types 3 and 4 but does not react with A disaccharide, A trisaccaride, A type 1, A type 2 or Ale b. Does not react with normal tissue sections of donors with blood group B and 0 but reacts specifically with malignant tissues.