1M4K:
reference: Crystal structure of the human natural killer cell activating receptor KIR2DS2 (CD158j)., Saulquin X, Gastinel LN, Vivier E, J Exp Med 2003 Apr 7;197(7):933-8. Epub 2003 Mar 31. PMID: 12668644

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