17466-45-4

Phalloidin is a bicyclic heptapeptide found in Amanita mushrooms that binds specifically to F-actin, stabilizing the microfilaments and inhibiting their depolymerization, thereby disrupting cell movement and growth. Phalloidin itself is not fluorescent; it is often conjugated with fluorescent molecules for F-actin staining and is widely used in research such as cytoskeletal imaging and cerebral vascular labeling.