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Electrostatic surface potential of the Bs-CspB ligand binding site. The electrostatic potential is projected onto the molecular surface of the protein of (A) Bs-CspB·rU6 and (B) Bs-CspB·rC7. The electrostatic potential was calculated with APBS (Baker et al. 2001) for pH 7.5, with a range from −5 kT (red) to 5 kT (blue).
