At this point the NOE can be calculated. The user function
[firstnumber=33] # Calculate the NOEs. minimise.calculate()
will calculate both the NOE and the errors. The NOE value will be calculated using the formula
NOE = , | (6.1) |
where Isat is the intensity of the peak in the saturated spectrum and Iref is that of the reference spectrum. The error is calculated by
σNOE = , | (6.2) |
where σsat and σref are the peak intensity errors in the saturated and reference spectra respectively. To create a file of the NOEs the command
[firstnumber=36] # Save the NOEs. value.write(param='noe', file='noe.out', force=True)
will create a file called noe.out with the NOE values and errors. The force flag will cause any file with the same name to be overwritten. An example of the format of noe.out is
# mol_name res_num res_name spin_num spin_name value error Ap4Aase_new_3_mol1 1 GLY 1 N None None Ap4Aase_new_3_mol1 2 PRO 11 N None None Ap4Aase_new_3_mol1 3 LEU 28 N None None Ap4Aase_new_3_mol1 4 GLY 51 N -0.038921946984531344 0.019031770246176943 Ap4Aase_new_3_mol1 5 SER 59 N -0.312404225679127 0.018596937298386886 Ap4Aase_new_3_mol1 6 MET 71 N -0.42850831873249773 0.02525856323041225 Ap4Aase_new_3_mol1 7 ASP 91 N -0.5305492810313481 0.027990623144176396 Ap4Aase_new_3_mol1 8 SER 104 N -0.5652842977581912 0.021706121467731133 Ap4Aase_new_3_mol1 9 PRO 116 N None None Ap4Aase_new_3_mol1 10 PRO 133 N None None Ap4Aase_new_3_mol1 11 GLU 150 N None None Ap4Aase_new_3_mol1 12 GLY 167 N -0.7036626368123614 0.04681370194503697 Ap4Aase_new_3_mol1 13 TYR 175 N -0.747464566367261 0.03594640051809186 Ap4Aase_new_3_mol1 14 ARG 200 N -0.7524129557634996 0.04957018638401278
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The relax user manual (PDF), created 2020-08-26.