3CII:
reference: Structural basis for NKG2A/CD94 recognition of HLA-E., Kaiser BK, Pizarro JC, Kerns J, Strong RK, Proc Natl Acad Sci U S A. 2008 May 6;105(18):6696-701. Epub 2008 Apr 30. PMID: 18448674

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