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Active site of DAHPSAp. A stereoview showing the active site residues interacting with the manganese ion (purple sphere), the PEP substrate (sphere model: orange-phosphorus, red-oxygen, and green-carbon), and water molecules (cyan spheres). Four residues and one water molecule are shown to coordinate to manganese (C46-Mn 2.58Å, H216-Mn 2.44Å, E242-Mn 2.13Å, D253-Mn 2.39Å, H2O-Mn 2.26Å).
