[Production of lectin from jack fruit (Artocarpus integrifolia) seeds and its interaction with carbohydrates and glycoproteins].

A method is developed to obtain lectin from jack fruit (Artocarpus integrifolia) seeds using an affinity chromatography on a sorbent prepared from the egg white. The minimum agglutination concentration of human erythrocytes is 80 ng/ml, the molecular weight of the preparation is about 39 kDa, it contains 1.8% of neutral hexoses and 3.1% of hexosamines. PAAG electrophoresis in the alkali system has revealed several molecular forms of lectin isolated by preparative electrophoresis, their properties are investigated. SDS-PAAG electrophoresis has revealed several types of polypeptide chains among which two chains (12 and 14 kDa) are predominant. Lectin possesses affinity to galactosides (not to free galactose) and N-acetylgalactosamine and interacts with O-glycans with high affinity. The preparation has mitogenic activity in optimal concentration 50 micrograms/ml.