extract_pathways_from_biopax: Extract Pathways from BioPAX
In grishagin/RIGbiopax: Extract and Compare Genes and Pathways from BioPAX

Extract pathways from a BioPAX object, then convert them into a separate biopax object.

1 2	extract_pathways_from_biopax(biopax, pw_ids, filename = NULL, exclude_subpw_comp_patt = NULL)

`biopax`	BioPAX object.
`pw_ids`	Pathway ids to extract.
`filename`	Filename of the new BioPAX
`exclude_subpw_comp_patt`	Pattern of sub-pathways, whose components will be excluded, i.e. the main pathway will refer to them, but the references to their components will be removed.