ISOLECTINS FROM SEEDS OF ARTOCARPUS-LAKOOCHA

Two isolectins (ALA-I and ALA-II), were isolated from seed extracts of Artocarpus lakoocha by anion exchange chromatography on Q-Sepharose f ast-flow columns at pH 8.5 and 8.0.ALA-I was unbound to the column at pH 8.5 and moved towards the cathode in non-denaturing polyacrylamide gel electrophoresis, whereas ALA-II possessed opposite properties. The two A. lakoocha agglutinins appeared to be composed of two dissimilar subunits (alpha and beta of M, 14000 and 17 200) bound non-covalently . The isolectins possessed several similar properties including: blood type agglutination; pH optimum; pH and temp stability; as well as bin ding specificity towards asialomucins.