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Overview of different ligands binding to the hinge region of PKA. A: 4‐Nitrobenzoic acid 13 (5N3J), B: 4‐Nitrophenol 14 (6Z08) C: 6‐Dimethylaminopyridine‐3‐carboxylic acid 15 (5N3E), D: 4‐(Trifluoromethyl)benzcarboximidamide 16 (5N3D), E: 4‐Hydroxy‐benzamidine 17 (6YPS), F: Thiophene‐3‐carboximidamide 18 (5N3C), G: Iso‐nicotinamidine 19 (6ZN0).
