1SRP:
reference: Crystal structure of Serratia protease, a zinc-dependent proteinase from Serratia sp. E-15, containing a beta-sheet coil motif at 2.0 A resolution., Hamada K, Hata Y, Katsuya Y, Hiramatsu H, Fujiwara T, Katsube Y, J Biochem (Tokyo). 1996 May;119(5):844-51. PMID: 8797082

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