Theoretical value of T1 as a function of τe (internal correlation time) in several values of order parameters (S2): (a) S2, 0; (b) S2, 0.6; (c) S2, 0.7; (d) S2, 0.8; and (e) S2, 0.9. The simulations were done using the Lipari-Szabo model free formalism with a fixed value of overall correlation time (τm = 100 ns). Theoretical values of T2 are between 7.4 and 7.7 ms for a, 7.8 and 12.2 ms for b, 7.7 and 10.4 ms for c, 7.5 and 9.11 ms for d, and 7.4 to 8.1 ms for e. Theoretical values of T2 in all order parameters are in agreement with the experimental 15N linewidth of ∼30 Hz (obtained from Fig. 3) when τm = 100 ns.