| 1BTG: reference: Nerve growth factor in different crystal forms displays structural flexibility and reveals zinc binding sites., Holland DR, Cousens LS, Meng W, Matthews BW, J Mol Biol 1994 Jun 10;239(3):385-400. PMID: 8201620 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).