2F91:
reference: Enzyme:substrate hydrogen bond shortening during the acylation phase of serine protease catalysis., Fodor K, Harmat V, Neutze R, Szilagyi L, Graf L, Katona G, Biochemistry. 2006 Feb 21;45(7):2114-21. PMID: 16475800

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