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Programmed death-ligand 1 (PD-L1, also known as B7-H1) is a ligand for PD-1 and belongs to the B7 superfamily.
HER2, or Human Epidermal Growth Factor Receptor 2, is a protein that plays a role in the growth and division of cells.
Immunohistochemistry stainers are very important tools in clinical diagnosis for finding different kinds of cancer.