Cytotoxic protein, part of the enterotoxin complex. Responsible for binding to erythrocytes. This enterotoxin is thought to be the cause of the diarrheal form of gastroenteritis caused by food-borne strains of B.cereus. Composed of a binding component, B, and two lytic components, L1 and L2. All three subunits act synergically to cause hemolysis.