title: Further investigation of Ii phenotypic variants.
abstract: I and i subtypes were investigated in erythrocytes with depressed expression of I antigen. It was confirmed that both, I and i antigens are heterogeneous. The depressed i status was found in all abnormal I phenotypes, but no direct correlation between i status and I subtype was found.
mesh_terms: D000937:Antigen-Antibody Reactions; D001323:Autoantibodies; D001789:Blood Group Antigens; D003450:Cryoglobulins / Q000032:analysis; D000939:Epitopes; D005312:Fetal Blood / Q000276:immunology; D006801:Humans; D007048:I Blood-Group System; D007518:Isoantibodies; D007519:Isoantigens / Q000235:genetics; D010641:Phenotype
chemical_list: D001323:Autoantibodies; D001789:Blood Group Antigens; D003450:Cryoglobulins; D000939:Epitopes; D007048:I Blood-Group System; D007518:Isoantibodies; D007519:Isoantigens