ulocuplumab ulocuplumab ulocuplumab (inn; development code mdx-1338) is a monoclonal antibody designed for the treatment of hematologic malignancies. ulocuplumabmonoclonal antibodytypewhole antibodysourcehumantargetc-x-c chemokine receptor type 4clinical dataother namesmdx-1338atc codenoneidentifierscas number1375830-34-4 ychemspidernoneunii7knp87l4x4chemical and physical dataformulac6486h9960n1720o2046s46molar mass146243.78 g·mol−1 this drug was developed by bristol-myers squibb.