Abstract
Publisher Summary Trees and shrubs of the genus Erythrina (family Leguminosae, tribe Phaseoleae) are widely distributed throughout the tropics and subtropics. The presence of hemagglutinating activity in extracts of seeds from different species of Erythrina has been known for a long time. It was also noted quite early that this activity is inhibited by galactose. To obtain Erythrina seeds, they should be collected at the appropriate season because they are difficult to obtain commercially. Their purification procedure consists essentially of three steps—namely, extraction with buffer, fractionation with ammonium sulfate, and affinity chromatography. The chapter discusses the physicochemical properties of Erythrina lectins. Erythrina lectins are specific for N-acetylgalactosamine and galactose; the relative inhibitory activity of these sugars is nearly the same (N-acetylgalactosamine being somewhat better than galactose) with slight variations observed for the different lectins.
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