1CI8:
reference: EstB from Burkholderia gladioli: a novel esterase with a beta-lactamase fold reveals steric factors to discriminate between esterolytic and beta-lactam cleaving activity., Wagner UG, Petersen EI, Schwab H, Kratky C, Protein Sci 2002 Mar;11(3):467-78. PMID: 11847270

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