Biological interlocked Process Ontology for metabolism	Natural Products Ontology	Source
http://purl.obolibrary.org/obo/BiPOm#protein	http://www.owl-ontologies.com/NPOntology.owl#Protein	LOOM
http://purl.obolibrary.org/obo/BiPOm#Enzyme	http://www.owl-ontologies.com/NPOntology.owl#Enzyme	LOOM