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2D CORDxy4 13C-13C correlation NMR spectra of U-13C,15N-LC8 protein spun at the MAS frequency of νr = 40 kHz and the magnetic field of 19.97 T, recorded with the mixing times of (a) 150 and (b) 500 ms. The first contour in all spectra is set at 5×σ with the multiplier of 1.2.
