4LVH:
reference: Insight into highly conserved h1 subtype-specific epitopes in influenza virus hemagglutinin., Cho KJ, Hong KW, Kim SH, Seok JH, Kim S, Lee JH, Saelens X, Kim KH, PLoS One. 2014 Feb 26;9(2):e89803. doi: 10.1371/journal.pone.0089803. eCollection, 2014. PMID: 24587046

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