5U1V:
reference: Structural basis for subtype-specific inhibition of the P2X7 receptor., Karasawa A, Kawate T, Elife. 2016 Dec 9;5. pii: e22153. doi: 10.7554/eLife.22153. PMID: 27935479

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