Semantic Web for Earth and Environment Technology Ontology	Protein Modification Ontology	Source
http://purl.obolibrary.org/obo/MOD_00412	http://sweetontology.net/procChemical/Oxidation	LOOM
http://purl.obolibrary.org/obo/MOD_00004	http://sweetontology.net/reprSciProvenance/Artifact	LOOM