6CYANA: atoms stereo - CYANA command

Parameters: selection=<string>             (default: <blank>)
            delete|list

Command that sets the stereospecific assignment status of the atoms
that match the selection <string>. By default, the selection made in
the most recent 'atoms select' command is used, or all atoms if no
selection has been made so far. Normally, the selected atoms are set
as stereoassigned.  If the option 'delete' is set, the stereospecific
assignment of the selected atoms is deleted. If the option 'list'
is set, the stereospecific assignment status of the selected atoms is
listed, and remains unchanged. It is sufficient to select one atom of
a diastereotopic pair to define or list the stereospecific assignment
status of both diastereotopic partners of a prochiral group.
