PD-L1 IHC 28-8 PharmDx

**Semantic type:** Laboratory Procedure

**Definition:** A proprietary assay for PD-L1 (Programmed Cell Death 1 Ligand 1). It uses antibody 28-8 to specifically bind PD-L1 on the cell membrane of immune cells and normal and tumor cells of epithelial origin in formalin-fixed, paraffin-embedded (FFPE) specimens.

**Synonyms:** - 28-8 PharmDx - Dako 28-8 - PD-L1 by clone 28-8 [Presence] in Tissue by Immune stain