2ERJ:
reference: Crystal structure of the IL-2 signaling complex: Paradigm for a heterotrimeric cytokine receptor., Stauber DJ, Debler EW, Horton PA, Smith KA, Wilson IA, Proc Natl Acad Sci U S A. 2006 Feb 13;. PMID: 16477002

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