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Figure 4
Mass spectrum for native SmhA (top) and SeMet SmhA (bottom) as used for crystallization. A molecular weight of 40 363.8 Da for SeMet SmhA (the molecular weight of native SmhA with a His6 tag is 39 942.4 Da) shows the incorporation of selenium at all nine methionine sites.

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
Volume 76| Part 12| December 2020| Pages 577-582
https://doi.org/10.1107/S2053230X20013862
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