As the ligand is a special segment in puzzles, it leads to errors if a script tries to change or get it's properties, for example it's type of amino-acid.

GaryForbis noticed, that the secondary structure of a ligand, retrieved by
get_ss(get_segment_count())
can be another like "E" for sheet, "H" for helix or "L" for loop.
For example, it can be "M".

I want to know if this is always the case.
This would help genreally to identify a ligand segment and prevent a script doing things to it which are not allowed.

regards,
Alex