产品介绍 Human CD137L, also known as 4-1BB ligand (4-1BBL), tumor necrosis factor ligand superfamily member 9, TNFSF9. GenBank Accession No. NM_003811, a.a. 50-254 with an N-terminal His-tag, expressed in a HEK293 cell expression system. MW = 24 kDa.