Hncaco.m - Revision history

Kuprov: Update function See also links and function index membership

2026-06-06T18:37:39Z

Update function See also links and function index membership

Kuprov: Rename Arguments section heading to Parameters

2026-06-05T17:49:35Z

Rename Arguments section heading to Parameters

Kuprov: Correct function page syntax from current Spinach source

2026-06-05T14:13:13Z

Correct function page syntax from current Spinach source

Kuprov: Normalise sequential blank lines

2026-04-25T11:26:37Z

Normalise sequential blank lines

Kuprov: Restore pre-bulk-edit wiki content

2026-04-05T14:49:01Z

Restore pre-bulk-edit wiki content

Kuprov: Sync syntax/arguments/outputs with current Spinach source

2026-04-05T14:03:21Z

Sync syntax/arguments/outputs with current Spinach source

Kuprov: Created page with "{{DISPLAYTITLE:hncaco.m}} NOTOC Protein-specific HN(CA)CO experiment (Figure 7.41 of "Protein NMR Spectroscopy", 2nd edition) using pre-set values of J-couplings used in t..."

2020-09-18T10:26:16Z

Created page with "{{DISPLAYTITLE:hncaco.m}} __NOTOC__ Protein-specific HN(CA)CO experiment (Figure 7.41 of "Protein NMR Spectroscopy", 2nd edition) using pre-set values of J-couplings used in t..."

New page

{{DISPLAYTITLE:hncaco.m}} __NOTOC__
Protein-specific HN(CA)CO experiment (Figure 7.41 of "Protein NMR Spectroscopy", 2nd edition) using pre-set values of J-couplings used in the magnetisation transfer stages. The simulation uses the bidirectional propagation method described in (http://dx.doi.org/10.1016/j.jmr.2014.04.002).

==Syntax==

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

==Arguments==

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].

H - Hamiltonian matrix, received from context function

R - relaxation superoperator, received from context function

K - kinetics superoperator, received from context function

==Outputs==

fid - three-dimensional free induction decay

==Examples==
Below is the output (3D spectrum and three projections) of the HN(CA)CO pulse sequence for the GB1 protein (examples/nmr_proteins/hncano_gb1.m).

[[File: hncaco_gb1.png]]

==Notes==
# The sequence is hard-wired to work on 1H,13C,15N proteins and uses PDB labels to select spins that will be affected by otherwise ideal pulses.
# Channels: F1 is 15N, F2 is 13C, F3 is 1H.
# Spin labels must be set to PDB atom IDs ('CA', 'HA', etc.) in sys.labels for this sequence to work properly

==See also==
[[Built-in_experiments#Protein_pulse_sequences|Protein pulse sequences]]

''Version 2.5, authors: [[Matt Walker]], [[Ilya Kuprov]]''

@@ Line 7: / Line 7: @@
       fid=hncaco(spin_system,parameters,H,R,K)
-==Arguments==
+==Parameters==
      parameters.npoints     - a vector of three integers giving the

@@ Line 38: / Line 38: @@
 ==See also==
-[[Built-in_experiments#Protein_pulse_sequences|Protein pulse sequences]]
+[[hcanh.m]], [[hcch_cosy.m]], [[hcch_tocsy.m]], [[hnca.m]], [[hnco.m]], [[hncoca.m]], [[noesyhsqc.m]], [[Built-in_experiments]]
 ''Version 2.5, authors: [[Matt Walker]], [[Ilya Kuprov]]''

@@ Line 4: / Line 4: @@
 ==Syntax==
-      fid=hnca(spin_system,parameters,H,R,K)
 ==Arguments==

@@ Line 1: / Line 1: @@
 {{DISPLAYTITLE:hncaco.m}} __NOTOC__
 Protein-specific HN(CA)CO experiment (Figure 7.41 of "Protein NMR Spectroscopy", 2nd edition) using pre-set values of J-couplings used in the magnetisation transfer stages. The simulation uses the bidirectional propagation method described in (http://dx.doi.org/10.1016/j.jmr.2014.04.002).
 ==Syntax==
-fid=hncaco(spin_system,parameters,H,R,K)
+     fid=hnca(spin_system,parameters,H,R,K)
 ==Arguments==
-parameters.npoints     - a vector of three integers giving the
+    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].
-−
      H   - Hamiltonian matrix, received from context function
-−
      R   - relaxation superoperator, received from context function
-−
      K   - kinetics superoperator, received from context function
 ==Outputs==
-fid - three-dimensional free induction decay
+     fid - three-dimensional free induction decay
 ==Examples==
 Below is the output (3D spectrum and three projections) of the HN(CA)CO pulse sequence for the GB1 protein (examples/nmr_proteins/hncano_gb1.m).
@@ Line 51: / Line 32: @@
 ==Notes==
 # The sequence is hard-wired to work on 1H,13C,15N proteins and uses PDB labels to select spins that will be affected by otherwise ideal pulses.
 # Channels: F1 is 15N, F2 is 13C, F3 is 1H.
@@ Line 57: / Line 37: @@
 ==See also==
 [[Built-in_experiments#Protein_pulse_sequences|Protein pulse sequences]]
 ''Version 2.5, authors: [[Matt Walker]], [[Ilya Kuprov]]''