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 [[Relaxation dispersion citation for relax|relax]].
== Parameters ==
== Links ==
The [[Relaxation dispersion citation for relax|implementation of the IT99 model in relax ]] can be seen in the:
* [http://www.nmr-relax.com/manual/IT99_2_site_CPMG_model.html relax manual],
* [http://www.nmr-relax.com/api/3.1/lib.dispersion.it99-module.html API documentation],