Biological interlocked Process Ontology for metabolism	Enzyme Reaction Ontology for annotating Partial Information of chemical transformation	Source
http://purl.obolibrary.org/obo/BiPOm#Gene_Product	http://reactionontology.org/piero/gene_product	LOOM
http://purl.obolibrary.org/obo/BiPOm#Enzyme	http://www.kegg.jp/entry/enzyme	LOOM