4LNM:
reference: On the Catalytic Mechanism and Stereospecificity of Escherichia coli L-Threonine Aldolase., di Salvo ML, Remesh SG, Vivoli M, Ghatge MS, Paiardini A, D'Aguanno S, Safo MK, Contestabile R, FEBS J. 2013 Oct 25. doi: 10.1111/febs.12581. PMID: 24165453

This OCA Structure page
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