产品介绍 Human secreted Programmed Cell Death 1 Ligand 1 (PD-L1) protein, also known as CD274, PDCD1L1, and B7 homolog 1 (B7-H1), GenBank Accession No. NM_014143, a.a. 19-239, expressed in an E. coli expression system. MW = 25 kDa.