Difference between revisions of "NS CPMG 2-site star"

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= Intro =
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The relaxation dispersion model for the numeric solution (NS) to the Bloch-McConnell equations for [[SQ CPMG-type data]] using complex conjugate matrices whereby the simplification {{:R2Azero}} = {{:R2Bzero}} is assumed.  The model is labelled as '''NS CPMG 2-site star''' in [[Relaxation dispersion citation for relax|relax]].
The relaxation dispersion model for the numeric solution (NS) to the Bloch-McConnell equations for [[SQ CPMG-type data]] using complex conjugate matrices whereby the simplification $R^0_{2A} = R^0_{2B}$ is assumed.  The model is labelled as '''NS CPMG 2-site star''' in [[Relaxation dispersion citation for relax|relax]].
 
  
 
== Parameters ==
 
== Parameters ==
  
The NS CPMG 2-site star model has the parameters {$R_2^0$, $...$, $p_A$, $\Delta\omega$, $k_{ex}$}.
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The NS CPMG 2-site star model has the parameters {{{:R2zero}}, ..., {{:pA}}, {{:Deltaomega}}, {{:kex}}}.
  
 
== References ==
 
== References ==
  
N/A
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The function uses an explicit matrix that contains relaxation, exchange and chemical shift terms. It does the 180 deg pulses in the CPMG train with conjugate complex matrices.  The approach of Bloch-McConnell can be found in chapter 3.1 of Palmer, A. G. 2004 ''Chem. Rev.'', '''104''', 3623-3640.  This function was written, initially in MATLAB, in 2010.
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The code was submitted on this [http://thread.gmane.org/gmane.science.nmr.relax.devel/4132 mailing list thread] by Paul Schanda.
  
 
== Related models ==
 
== Related models ==
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The [[Relaxation dispersion citation for relax|implementation of the NS CPMG 2-site star model in relax]] can be seen in the:
 
The [[Relaxation dispersion citation for relax|implementation of the NS CPMG 2-site star model in relax]] can be seen in the:
* [http://www.nmr-relax.com/manual/reduced_NS_2_site_star_CPMG_model.html relax manual],  
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* [http://www.nmr-relax.com/manual/The_reduced_NS_2_site_star_CPMG_model.html relax manual],  
 
* [http://www.nmr-relax.com/api/3.1/lib.dispersion.ns_cpmg_2site_star-module.html API documentation],
 
* [http://www.nmr-relax.com/api/3.1/lib.dispersion.ns_cpmg_2site_star-module.html API documentation],
 
* [http://www.nmr-relax.com/analyses/relaxation_dispersion.html#NS_CPMG_2-site_star relaxation dispersion page of the relax website].
 
* [http://www.nmr-relax.com/analyses/relaxation_dispersion.html#NS_CPMG_2-site_star relaxation dispersion page of the relax website].
  
 
== See also ==
 
== See also ==
[[Category:Relaxation_dispersion]]
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[[Category:Models]]
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[[Category:Dispersion models]]
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[[Category:Relaxation dispersion analysis]]

Latest revision as of 16:46, 6 November 2015

The relaxation dispersion model for the numeric solution (NS) to the Bloch-McConnell equations for SQ CPMG-type data using complex conjugate matrices whereby the simplification R2A0 = R2B0 is assumed. The model is labelled as NS CPMG 2-site star in relax.

Parameters

The NS CPMG 2-site star model has the parameters {R20, ..., pA, Δω, kex}.

References

The function uses an explicit matrix that contains relaxation, exchange and chemical shift terms. It does the 180 deg pulses in the CPMG train with conjugate complex matrices. The approach of Bloch-McConnell can be found in chapter 3.1 of Palmer, A. G. 2004 Chem. Rev., 104, 3623-3640. This function was written, initially in MATLAB, in 2010.

The code was submitted on this mailing list thread by Paul Schanda.

Related models

The NS CPMG 2-site star model is a parametric restriction of the NS CPMG 2-site star full model.

Links

The implementation of the NS CPMG 2-site star model in relax can be seen in the:

See also