stomoxyn stomoxyn stomoxyn is an insect antimicrobial peptide localised in the gut epithelium, which functions in killing a range of microorganisms, parasites and some viruses. in water, stomoxyn has a flexible random coil in structure, while in trifluoroethanol it adopts a stable helical structure. structural similarities to the antimicrobial peptide cecropin a from hyalophora cecropia suggest that it may function in a similar manner by disrupting the bacterial membrane. stomoxynidentifierssymbolstomoxynpfampf11585interproipr021037opm superfamily151opm protein1zrvavailable protein structures:pfam structures / ecod pdbrcsb pdb; pdbe; pdbjpdbsumstructure summary