This is the numerical model for 3-site exchange for proton-heteronuclear SQ, ZQ, DQ and MQ CPMG data, as derived in (Korzhnev et al., 2004b,2005a,2004a). However it has been extended to allow the A↔C transition. To simplify the optimisation space for the model as in the `NS MMQ 3-site linear' model, the assumption R2A0 = R2B0 = R2C0 = R20 has been made.
The basic evolution matrices for single, zero and double quantum CPMG-type data for this model are
|A± = ea±⋅τCPMG,||(11.70)|
The mj matrices for this model are
More information about the NS MMQ 3-site model is available from:
The relax user manual (PDF), created 2020-08-26.