title: Relationship between 4a and 4b HLA-determined specificities and C3 receptors of leukocyte membrane.
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology*; D001665:Binding Sites; D002462:Cell Membrane / Q000276:immunology; D003176:Complement C3 / Q000378:metabolism*; D003165:Complement System Proteins / Q000378:metabolism*; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D006801:Humans; D007104:Immune Adherence Reaction; D009000:Monocytes / Q000276:immunology*
chemical_list: D003176:Complement C3; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D003165:Complement System Proteins