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B14
,The advantage of this code will be that you'll always get the right answer provided you've got 2-site exchange, in-phase magnetisation and on-resonance pulses.
= Comments from the Author =
During the implementation of model B14, Andrew Baldwin wished to raise the attention to:
# Danger of errors of approximations
# That optimal accuracy analysis should include off resonance effects.
Please read:
* A.J. Baldwin (2014). An exact solution for R2,eff in CPMG experiments in the case of two site chemical exchange. ''J. Magn. Reson.'', 2014. ([http://dx.doi.org/10.1016/j.jmr.2014.02.023 10.1016/j.jmr.2014.02.023]).
* Myint, W. & Ishima, R., Chemical exchange effects during refocusing pulses in constant-time CPMG relaxation dispersion experiments. ''J Biomol Nmr.'', 2009. ([http://dx.doi.org/10.1007/s10858-009-9344-9 10.1007/s10858-009-9344-9]).
* Bain, A. D., Kumar Anand, C. & Nie, Z., Exact solution of the CPMG pulse sequence with phase variation down the echo train: application to R(2) measurements. ''J. Magn. Reson.'', 2011), ([http://dx.doi.org/10.1016/j.jmr.2011.01.009 10.1016/j.jmr.2011.01.009]).
# Differential relaxation effects:
* Vallurupalli, P., Hansen, D. F., Stollar, E., Meirovitch, E. & Kay, L. E. Measurement of bond vector orientations in invisible excited states of proteins. ''Proc Natl Acad Sci USA'', 2007. ([http://dx.doi.org/10.1073/pnas.0708296104 10.1073/pnas.0708296104]).
* Vallurupalli, P., Hansen, D. F. & Kay, L. E., Structures of invisible, excited protein states by relaxation dispersion NMR spectroscopy. ''Proc Natl Acad Sci USA'', 2008. ([http://dx.doi.org/10.1073/pnas.0804221105 10.1073/pnas.0804221105]) 0.1073/pnas.0804221105
== Equation ==