PD-L1 (Programmed death-ligand 1) critically regulates T cell proliferation and migration, acting as a biomarker for periodontitis and pre-eclampsia. CD274 is its human ortholog. Biased expression in the thymus (RPKM 102.9), spleen (RPKM 58.3), and other tissues emphasizes PD-L1s centrality in immune regulation across diverse physiological and pathological conditions. PD-L1 Protein, Rat (HEK293, Fc) is the recombinant rat-derived PD-L1 protein, expressed by HEK293 , with C-hFc labeled tag.