5FAC:
reference: Structural and functional characterization of the alanine racemase from Streptomyces coelicolor A3(2)., Tassoni R, van der Aart LT, Ubbink M, van Wezel GP, Pannu NS, Biochem Biophys Res Commun. 2017 Jan 29;483(1):122-128. doi:, 10.1016/j.bbrc.2016.12.183. Epub 2016 Dec 29. PMID: 28042035

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