A recombinant, human monoclonal antibody targeting an extracellular epitope of human prostate specific membrane antigen (PSMA) that is conjugated with a fluorescent dye A488, with potential imaging activity. Upon intravenous administration, the MDX1201 moiety of anti-PSMA monoclonal antibody MDX1201-A488 targets PSMA expressed on cancer cells. Subsequently, the A488 moiety can then be visualized by fluorescence-based imaging and the amount of PSMA-expressing tumor cells can be assessed. A488 is a photostable fluorescent dye with a high quantum yield. PSMA, a tumor-associated antigen and type II transmembrane protein, is expressed on the membrane of prostatic epithelial cells and overexpressed on prostate tumor cells. Check for active clinical trials using this agent. (NCI Thesaurus)