3HJR:
reference: Structural basis for the kexin-like serine protease from Aeromonas sobria as a sepsis-causing factor., Kobayashi H, Utsunomiya H, Yamanaka H, Sei Y, Katunuma N, Okamoto K, Tsuge H, J Biol Chem. 2009 Aug 4. PMID: 19654332

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