3PGM:
reference: Structure and activity of phosphoglycerate mutase., Winn SI, Watson HC, Harkins RN, Fothergill LA, Philos Trans R Soc Lond B Biol Sci. 1981 Jun 26;293(1063):121-30. PMID: 6115412

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