Physico-Chemical Methods and Properties	Phylogenetics Ontology	Source
http://www.co-ode.org/ontologies/ont.owl#DNASequence	http://purl.obolibrary.org/obo/FIX_0000313	LOOM
http://www.co-ode.org/ontologies/ont.owl#RNASequence	http://purl.obolibrary.org/obo/FIX_0000314	LOOM