1ESP:
reference: E144S active-site mutant of the Bacillus cereus thermolysin-like neutral protease at 2.8 A resolution., Lister SA, Wetmore DR, Roche RS, Codding PW, Acta Crystallogr D Biol Crystallogr. 1996 May 1;52(Pt 3):543-50. PMID: 15299677

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