Sarcotoxin II is an antibacterial protein which plays a role in the inflammatory response of this insect. The main effect of sarcotoxin II on E.coli may be the inhibition of cell wall synthesis, including septum formation. Synthesized by the fat body and is eventually secreted into the hemolymph. In response to injury of the body wall of the larvae. Sarcotoxin II consists of at least four structurally related proteins named sarcotoxin IIa, II-1, II-2, and II-3. Belongs to the attacin/sarcotoxin-2 family.