6BB5:
reference: Hemoglobin crystals immersed in liquid oxygen reveal diffusion channels., Terrell JR, Gumpper RH, Luo M, Biochem Biophys Res Commun. 2018 Jan 8;495(2):1858-1863. doi:, 10.1016/j.bbrc.2017.12.038. Epub 2017 Dec 12. PMID: 29246762

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