4O4Z:
reference: Crystallographic Studies with Xenon and Nitrous Oxide Provide Evidence for Protein-dependent Processes in the Mechanisms of General Anesthesia., Abraini JH, Marassio G, David HN, Vallone B, Prange T, Colloc'h N, Anesthesiology. 2014 Sep 10. PMID: 25211169

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