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The Carver and Richards 1972 relaxation dispersion model extended for MMQ CPMG-type data by Korzhnev, et al., 2004. This is labelled as MMQ CR72 in relax.


The MMQ CR72 model has the parameters {R20, ..., pA, Δω, ΔωH, kex}.


The references for the MMQ CR72 model are:

  • Korzhnev, D. M., Kloiber, K., Kanelis, V., Tugarinov, V., and Kay, L. E. (2004). Probing slow dynamics in high molecular weight proteins by methyl-TROSY NMR spectroscopy: application to a 723-residue enzyme. J. Am. Chem. Soc., 126(12), 3964-3973. (DOI: 10.1021/ja039587i)
  • Carver, J. P. and Richards, R. E. (1972). General 2-site solution for chemical exchange produced dependence of T2 upon Carr-Purcell pulse separation. J. Magn. Reson., 6(1), 89-105. (DOI: 10.1016/0022-2364(72)90090-X)


The implementation of the MMQ CR72 model in relax can be seen in the:

See also