Cytochalasin B is used in actin polymerization studies and cytological research. Cytochalasin B is a metabolite of the fungus Drechslera dematoidea which binds to the barbed end of actin filaments resulting in inhibition of both the association and dissociation of subunits. As opposed to other Cytochalasins, cytochalasin A and Cytochalasin B bind to the glucose transporter and inhibit monosaccharide transport across the plasma membrane. Cytochalasin B inhibits phagocytosis by both mononuclear phagocytes and polymorphonuclear leukocytes.