2VHA:
reference: Crystal structure of a glutamate/aspartate binding protein complexed with a glutamate molecule: structural basis of ligand specificity at atomic resolution., Hu Y, Fan CP, Fu G, Zhu D, Jin Q, Wang DC, J Mol Biol. 2008 Sep 26;382(1):99-111. Epub 2008 Jul 9. PMID: 18640128

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