urtoxazumab urtoxazumab urtoxazumab is a humanized monoclonal antibody against diarrhoea caused by escherichia coli, serotype o121. the drug is designed to bind to a toxin of this bacterium, so that it can be more easily broken down and eliminated from the body. urtoxazumabmonoclonal antibodytypewhole antibodysourcehumanized (from mouse)targete. coli shiga-like toxin ii b subunitclinical dataatc codenoneidentifierscas number502496-16-4 nchemspidernoneunii232d35b3ntchemical and physical dataformulac6414h9934n1718o2010s40molar mass144556.44 g·mol−1 ny (what is this?) (verify)