IT99

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The Ishima and Torchia 1999 2-site exchange on all times scales with the constraint that $p_A \gg p_B$ for SQ CPMG-type data. This model is labelled as IT99 in relax.

Parameters

The IT99 model has the parameters {$R_2^0$, $...$, $p_A$, $\Delta\omega$, $k_{ex}$}.

Reference

The reference for the IT99 model is:

  • Ishima, R. and Torchia, D. (1999). Estimating the time scale of chemical exchange of proteins from measurements of transverse relaxation rates in solution. J. Biomol. NMR, 14(4), 369-372. (10.1023/A:1008324025406).

Links

The implementation of the IT99 model in relax can be seen in the:

See also