comment "Definition: An entity feature that represents the resulting physical entity subsequent to a cleavage or degradation event.
Usage: Fragment Feature can be used to cover multiple types of modfications to the sequence of the physical entity:
1. A protein with a single cleavage site that converts the protein into two fragments (e.g. pro-insulin converted to insulin and C-peptide). TODO: CV term for sequence fragment? PSI-MI CV term for cleavage site?
2. A protein with two cleavage sites that removes an internal sequence e.g. an intein i.e. ABC -> A
3. Cleavage of a circular sequence e.g. a plasmid.
In the case of removal ( e.g. intron) the fragment that is *removed* is specified in the feature location property. In the case of a "cut" (e.g. restriction enzyme cut site) the location of the cut is specified instead.
Examples: Insulin Hormone" (string)