1AY2:
reference: Structure of the fibre-forming protein pilin at 2.6 A resolution., Parge HE, Forest KT, Hickey MJ, Christensen DA, Getzoff ED, Tainer JA, Nature 1995 Nov 2;378(6552):32-8. PMID: 7477282

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