It is a type of pore-forming toxin. The model for pore formation is step-wise. First, the cytotoxin’s “S” subunit recognizes specific protein-containing receptors, or an integrin on the host cell’s surface.
It is categorized as a pore-forming toxin. The process of forming pores follows a sequential pattern. First, the cytotoxin’s "S" subunit locates particular protein-containing receptors or an integrin on the host cell's surface.