5WB2:
reference: Viral GPCR US28 can signal in response to chemokine agonists of nearly unlimited structural degeneracy., Miles TF, Spiess K, Jude KM, Tsutsumi N, Burg JS, Ingram JR, Waghray D, Hjorto GM, Larsen O, Ploegh HL, Rosenkilde MM, Garcia KC, Elife. 2018 Jun 8;7. pii: 35850. doi: 10.7554/eLife.35850. PMID: 29882741

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