Human secreted Programmed Death Ligａnd 2 (PD-L2)-Fc fusion protein, also known as CD273, PDCDL1G2, and B7-DC, GenBank Accession No. NM_025239, a.a. 20-219, fused at the C-terminus to the Fc portion of human IgG1 expressed in a HEK293 cell expression system. MW = 49 kDa.