# Noesyhsqc.m

From Spinach Documentation Wiki

Phase-sensitive NOESY-HSQC sequence from

http://pubs.acs.org/doi/abs/10.1021/bi00441a004

using the bidirectional propagation method described in

http://dx.doi.org/10.1016/j.jmr.2014.04.002

The sequence is hard-wired to 1H,15N,1H. Syntax:

fid=noesyhsqc(spin_system,parameters,H,R,K)

where H is the hamiltonian commutation superoperator, R is the re- relaxation superoperator and K is the chemical kinetics superope- rator. The output has four fields

fid.pos_pos, fid.pos_neg, fid.neg_pos, fid.neg_neg

that are used in the subsequent States quadrature processing. The following parameters are required:

parameters.npoints - a vector of three integers giving the number of points in the three temporal dimensions, ordered as [t1 t2 t3].

parameters.sweep - a vector of three real numbers giving the sweep widths in the three frequen- cy dimensions, ordered as [f1 f2 f3].

parameters.J - J-coupling for the HSQC stage magneti- zation transfer, Hz.

parameters.tmix - NOESY stage mixing time, seconds.

Frequency dimensions: F1 is 1H, F2 is 15N, F3 is 1H, carbon is de- coupled throughout.