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. Author manuscript; available in PMC: 2019 Aug 1.
Published in final edited form as: Biochim Biophys Acta. 2018 Apr 30;1859(8):577–590. doi: 10.1016/j.bbabio.2018.04.012

Figure 7. Proposed proton channel in Gt cyt bd.

Figure 7

A series of conserved hydrophilic residues along with the propionate of heme d and internal water molecules that are not observed in the X-ray structure line a proton channel conveying protons from the cytoplasm to GtE378 (EcE445) and from there to the oxygenated species at the active site. (Figure made with VMD)