5K1R:
reference: Characterization of homologous sphingosine-1-phosphate lyase isoforms in the bacterial pathogen Burkholderia pseudomallei., McLean CJ, Marles-Wright J, Custodio R, Lowther J, Kennedy AJ, Pollock J, Clarke DJ, Brown AR, Campopiano DJ, J Lipid Res. 2017 Jan;58(1):137-150. doi: 10.1194/jlr.M071258. Epub 2016 Oct 26. PMID: 27784725

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