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Figure 8
The active site of amicyanin and a strong hydrogen bond to an unexchanged tryptophan (PDB entry 3l45, H/D exchanged; Sukumar et al., 2010BB221). (a) Conserved active-site residues coordinating the copper cofactor. (b) The hydrogen bond between the non-exchanged Trp45 and Tyr90. 2Fo − Fc NSLD map (σ = 1.00) is displayed as a blue mesh; H and D atoms are displayed in white and turquoise, respectively.

Journal logoSTRUCTURAL
BIOLOGY
ISSN: 2059-7983
Volume 77| Part 10| October 2021| Pages 1251-1269
https://doi.org/10.1107/S2059798321009025
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