Benzyl 2-acetamido-2-deoxy-3-O-(b-D-galactopyranosyl)-a-D-galactopyranoside is a lectin that has been found to have agglutinin activity. Lectins are carbohydrate binding proteins that bind to glycoproteins and glycolipids. This protein has also been shown to be an antigen, which can stimulate the production of antibodies in the body.