1EY3:
reference: Structural mechanism of enoyl-CoA hydratase: three atoms from a single water are added in either an E1cb stepwise or concerted fashion., Bahnson BJ, Anderson VE, Petsko GA, Biochemistry 2002 Feb 26;41(8):2621-9. PMID: 11851409

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