Process Chemistry Ontology	BioPAX Ontology of Biological Pathways	Source
http://www.biopax.org/release/biopax-level3.owl#ChemicalStructure	http://purl.obolibrary.org/obo/PROCO_0000199	LOOM
http://www.biopax.org/release/biopax-level3.owl#Entity	http://purl.obolibrary.org/obo/BFO_0000001	LOOM
http://www.biopax.org/release/biopax-level3.owl#Protein	http://purl.obolibrary.org/obo/PR_000000001	LOOM