Actin binding toxins and the residues required for their binding on the actin monomer

Cytochalasin D: Binds monomers and barbed ends, inhibits polymerization. Tolytoxin: Binds monomers and barbed ends, inhibits polymerization 1Kx more effective. Latrunculin A: Binds monomers and inhibits polymerization. Phalloidin: Binds and stabilizes F-actin, can be labelled with a fluorescent dye, making it very useful for staining actin filaments in cells.