SensiStain™ Anti-PD-1 Antibody is designed for detection of the programmed death 1 (PD-1) receptor protein which is expressed on the surface of T cells when probing for cancer cells expressing PD-L1. Studies have associated that blocking PD-1 may reduce tumors in certain cancers, thus becoming a highly sought out protein to study signaling pathways and effects it has on cancer progression.