Lectin with affinity for N-acetyl-galactosamine, carragenan and glycoprotein porcine stomach mucin (PSM). Has metal-independent hemagglutinating activity towards erythrocytes from rabbit and human. Hemagglutinating activity is not inhibited by D-galactose, D-glucose, D-mannose, D-fucose, methyl-alpha-D-galactopyranoside, methyl-alpha-D-glucopyranoside, N-acetyl-glucosamine, N-acetyl-mannosamine, D-fructose, alpha-D-lactose, beta-D-lactose, D-lactulose, D-sucrose, fucoidan or glycoproteins thyroglobulin and ovalmucoid. Optimum pH is 6-7 for hemagglutinating activity. Activity drops rapidly at lower or higher pH. Thermostable. Retains hemagglutinating activity after incubation at 60 degrees Celsius for 1 hour. At higher temperatures activity drops drastically. Probable heterotrimer consisting of an alpha chain and two beta chains. The alpha chain can probably have different glycosylation states. Glycosylated.