2JOW:
reference: Differences in the Electrostatic Surfaces of the Type III Secretion Needle Proteins PrgI, BsaL, and MxiH., Wang Y, Ouellette AN, Egan CW, Rathinavelan T, Im W, De Guzman RN, J Mol Biol. 2007 Jun 15;. PMID: 17617421

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