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= Intro =
# Nikolai Skrynnikov, U{* [http://article.gmane.org/gmane.science.nmr.relax.devel/4279}Nikolai Skrynnikov],# Martin Tollinger, U{* [http://article.gmane.org/gmane.science.nmr.relax.devel/4276}Martin Tollinger],# Paul Schanda, U{* [http://article.gmane.org/gmane.science.nmr.relax.devel/4271}Paul Schanda],# Mathilde Lescanne, U{* [http://article.gmane.org/gmane.science.nmr.relax.devel/4138}Mathilde Lescanne],# Dominique Marion, U{* [http://article.gmane.org/gmane.science.nmr.relax.devel/4157}Dominique Marion].
The relaxation dispersion model for the numeric solution (NS) to the Bloch-McConnell equations for [[SQ CPMG-type data]]. This uses the Maple expanded and fast equations from Nikolai Skrynnikov. The model is labelled as '''NS CPMG 2-site expanded''' in [[Relaxation dispersion citation for relax|relax]].
== Parameters ==
The NS CPMG 2-site expanded model has the parameters {$R_2^0${{:R2zero}}, $...$, $p_A${{:pA}}, $\Delta\omega${{:Deltaomega}}, $k_{ex{:kex}}$}.
== Code ==
The library code.<br>http://svn.gna.org/viewcvs/*checkout*/ {{relax/trunk/url|path=lib/dispersion/ns_cpmg_2site_expanded.py?revision=HEAD}}
== Reference ==
The reference for the NS CPMG 2-site expanded model is:
* Tollinger, M., Skrynnikov, N. R., Mulder, F. A. A., Forman-Kay, J. D., and Kay, L. E. (2001). Slow dynamics in folded and unfolded states of an sh3 domain. ''J. Am. Chem. Soc.'', '''123'''(46), 11341-11352. ([http{{#lst://dx.doi.org/10.1021/ja011300z 10.1021/ja011300z]).Citations|Tollinger01}}
== Code origin ==
The code originates as optimization function number 5 from the fitting_main_kex.py script from Mathilde Lescanne, Paul Schanda, and Dominique Marion (see U{the [http://thread.gmane.org/gmane.science.nmr.relax.devel/4138}mailing list discussion], U{the [https://gna.org/task/?7712#comment2} relax task with attached code] and U{the [https://gna.org/support/download.php?file_id=18262}file]).
Links to the copyright licensing agreements from all authors are:
== Links ==
The [[Relaxation dispersion citation for relax|implementation of the NS CPMG 2-site expanded model in relax]] can be seen in the:
* [http://www.nmr-relax.com/manual/NS_2_site_expanded_CPMG_modelThe_NS_2_site_expanded_CPMG_model.html relax manual],
* [http://www.nmr-relax.com/api/3.1/lib.dispersion.ns_cpmg_2site_expanded-module.html API documentation],
* [http://www.nmr-relax.com/analyses/relaxation_dispersion.html#NS_CPMG_2-site_expanded relaxation dispersion page of the relax website].
== See also ==
[[Category:Models]]
[[Category:Dispersion models]]
[[Category:Relaxation dispersion analysis]]
