Relaxation measurements for rmMBP at 600 MHz and 300 K. We show the R1 values (A and B), R2 values (C and D), and {1H}-15N NOE intensities (E and F) of 13C15N-rmMBP in 30% TFE-d2 (A, C, and E), and in 100 mM KCl (B, D, and F). Experimental values are shown as solid squares (▪) with experimental error. The MODELFREE (v. 4.20) best fits are represented with open circles (○). The goodness of fit is clear at points where an open circle obscures the solid square.