1FM5:
reference: Crystal structure of human CD69: a C-type lectin-like activation marker of hematopoietic cells., Natarajan K, Sawicki MW, Margulies DH, Mariuzza RA, Biochemistry 2000 Dec 5;39(48):14779-86. PMID: 11101293

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