title: The use of the preparative ultracentrifuge to detect primary interactions between I-131-labeled antigen and antibody.
mesh_terms: D000818:Animals; D000937:Antigen-Antibody Reactions; D011817:Rabbits; D012711:Serum Albumin, Radio-Iodinated; D014461:Ultracentrifugation; D005719:gamma-Globulins
chemical_list: D012711:Serum Albumin, Radio-Iodinated; D005719:gamma-Globulins