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Two important protein–protein interaction targets. Left top: p53 (green) with MDM2 (grey), PDB ID: 1YCR; bottom: footprint of p53 on MDM2 shown as blue surface. Right top: PD1 (green) with PD1L (grey), PDB ID: 4ZQK; bottom: footprint of PD1 on PD1L shown as blue surface.
