Selection rules

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Most commands of the CYANA command groups atoms, angles, distances, peaks, shifts, angles, couplings, rdc, pcs, and structures apply to sets of these objects.

The following objects can be selected in CYANA:

Atoms or torsion angles are the basic units of selection. Peaks, distance restraints, and scalar couplings are selected as pairs of atoms, possibly subject to additional conditions. Chemical shifts are selected by the corresponding atom. Torsion angles can be selected in the same way as atoms, using angle names instead of atom names.

Selections can either be volatile, i.e. be used temporarily for the current command, or persistent, i.e. be used for the following commands. Persistent selections are made with the commands atoms select, angles select, distances select, peaks select, couplings select, rdc select, pcs select, and structures select. Selections made by other commands are always volatile.

Ranges of numbers in selections, e.g. residue ranges, can be specified in one of the following ways:

A number
A range of numbers
Alternative format for a range of numbers (only for n ≥ 0)
From number m onwards
From number m onwards; alternative format
From the first up to number n.