Purity > 85% as determined by SDS-PAGE. MW: 64.3kDa. Full Length: 1-522aa. N-terminal 10xHis-tagged and C-terminal Myc-tagged. Escherichia coli. This colicin is a channel-forming colicin. This class of transmembrane toxins depolarize the cytoplasmic membrane, leading to dissipation of cellular energy. Colicins are polypeptide toxins produced by and active against E.coli and closely related bacteria.