D-galactose-specific lectin. Has Ca(2+) and Mn(2+)-independent hemagglutinating activity towards rabbit erythrocytes. Has an epithelium-dependent vasorelaxant effect in vitro. Hemagglutinating activity stable between pH 6 and 8. Hemagglutinating activity stable up to 60 degrees Celsius but diminishes with higher temperatures and is absent at 100 degrees Celsius. Tetramer. Glycosylated. Alpha chain. Beta chain. Gamma chain. Belongs to the leguminous lectin family.