nacolomab tafenatox nacolomab tafenatox nacolomab tafenatox is a mouse monoclonal antibody. the antibody itself, nacolomab, is fused with enterotoxin a from staphylococcus aureus (which is reflected by 'tafenatox' in the drug's name). nacolomab tafenatoxschematic image of nacolomab tafenatox:vh, vl: variable (antigen binding) domains of antibody fragment ch1, cl: constant domains of antibody fragment sag: enterotoxin a (acting as a superantigen)monoclonal antibodytypefab fragmentsourcemousetargetcolorectal tumor antigen c242clinical dataatc codenoneidentifierscas number150631-27-9 nchemspidernoneuniiprc47ta1nu ny (what is this?) (verify)