Peanut agglutinin was purified by affinity chromatography on Sepharose-epsilon-aminocaproyl-beta-D-galactopyranosylamine. The purified lectin obtained in a yield of 150 mg/100 g of defatted peanut was homogeneous on polyacrylamide gel electrophoresis, ultracentrifugation, and gel filtration. This intrinsic sedimentation coefficient (So20,w) and the intrinsic diffusion coefficient (Do20,w) were ...