2EKG:
reference: Structural basis for the inactivation of Thermus thermophilus proline dehydrogenase by N-propargylglycine., White TA, Johnson WH Jr, Whitman CP, Tanner JJ, Biochemistry. 2008 May 20;47(20):5573-80. Epub 2008 Apr 22. PMID: 18426222

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