4RJY:
reference: Molecular basis of E. colil-threonine aldolase catalytic inactivation at low pH., Remesh SG, Ghatge MS, Ahmed MH, Musayev FN, Gandhi A, Chowdhury N, di Salvo ML, Kellogg GE, Contestabile R, Schirch V, Safo MK, Biochim Biophys Acta. 2015 Jan 2;1854(4):278-283. doi:, 10.1016/j.bbapap.2014.12.023. PMID: 25560296

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).