Description_x000D_ General description_x000D_ Human secreted Programmed Cell Death 1 Ligand 1 (PD-L1)-Fc fusion protein, also known as CD274 and B7 homolog 1 (B7-H1) with a S117Q mutation, GenBank Accession No. NM_014143, amino acids 19-239, fused at the Cterminus with the Fc portion of human IgG1,with C-terminal Avitag™ expressed in a HEK293 cell expression system and enzymatically biotin-labeled using Avitag™ technology. MW = 54 kDa._x000D_ Physical form_x000D_ Aqueous solution_x000D_ Legal Information_x000D_ AviTag is a trademark of Avidity, LLC