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Electrostatic surface charge (red: negative and blue: positive) for OhLys, HEWL, Bovine gut lysozyme and house fly gut lysozyme, calculated at pH 7.0, within CCP4mg. (A) viewed from the active site side of the enzymes, (B) from the opposite side. The single clear observation is that the rear (B) of OhLys carries a substantially higher negative charge. The structures were superposed using the Gesamt option in CCP4mg. The ligand is taken from the OhLys complex.
