6E21:
reference: Zooming in on protons: Neutron structure of protein kinase A trapped in a product complex., Gerlits O, Weiss KL, Blakeley MP, Veglia G, Taylor SS, Kovalevsky A, Sci Adv. 2019 Mar 20;5(3):eaav0482. doi: 10.1126/sciadv.aav0482. eCollection 2019, Mar. PMID: 30906862

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