Anatumomab mafenatox (ABR-214936) is a 73 KDa recombinant protein to recognize the tumor-associated antigen 5T4, which is widely expressing in malignancy. Anatumomab mafenatox is between a modified form of SEA and a murine Fab. The main side effects of Anatumomab mafenatox are reported to include fever, low blood pressure, pain, nausea and drowsiness.