modotuximab modotuximab modotuximab (inn; formerly zatuximab) is a chimeric monoclonal antibody designed for the treatment of cancer. it acts as an immunomodulator and binds to her1. modotuximabmonoclonal antibodytypewhole antibodysourcechimerictargether1clinical dataatc codenoneidentifierscas number1310460-86-6chemspidernoneunii1w7bd1m08nkeggd11125