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Figure 6
2D 15N–13Cα correlation spectra of NaKΔ19 in 50 mM K+ (positive signals in red; negative signals in maroon) and with 50 mM K+ and 50 mM Na+ (positive signals in blue; negative signals in dark blue). Indicated are the residues belonging to the lower part of the SF.

IUCrJ
Volume 8| Part 3| May 2021| Pages 421-430
ISSN: 2052-2525
https://doi.org/10.1107/S205225252100213X