1A3P:
reference: Role of the 6-20 disulfide bridge in the structure and activity of epidermal growth factor., Barnham KJ, Torres AM, Alewood D, Alewood PF, Domagala T, Nice EC, Norton RS, Protein Sci 1998 Aug;7(8):1738-49. PMID: 10082370

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