1KY9:
reference: Crystal structure of DegP (HtrA) reveals a new protease-chaperone machine., Krojer T, Garrido-Franco M, Huber R, Ehrmann M, Clausen T, Nature 2002 Mar 28;416(6879):455-9. PMID: 11919638

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