| 3FN3: reference: A dimeric structure of PD-L1: functional units or evolutionary relics?, Chen Y, Liu P, Gao F, Cheng H, Qi J, Gao GF, Protein Cell. 2010 Feb;1(2):153-60. Epub 2010 Feb 6. PMID: 21203985 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).