Human PD-L1 inhibitor I is a peptide ligand that specifically inhibits the interaction between human PD-L1 and human PD-1. It exhibits a KD value of 3.39 μM, indicating its binding affinity. The presence of Human PD-L1 inhibitor I disrupts the binding between human PD-L1 and human PD-1, thereby attenuating their respective functions.
Human PD-L1 inhibitor IV is a polypeptide compound that competitively inhibits the human PD-1 protein. It has a Kd value of 1.38 μM and effectively blocks the interaction between hPD-1 and hPD-L1.