2VPF:
reference: The crystal structure of vascular endothelial growth factor (VEGF) refined to 1.93 A resolution: multiple copy flexibility and receptor binding., Muller YA, Christinger HW, Keyt BA, de Vos AM, Structure 1997 Oct 15;5(10):1325-38. PMID: 9351807

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