Systems Biology Ontology	BioTop Ontology	Source
http://purl.org/biotop/biotop.owl#Gene	http://biomodels.net/SBO/SBO_0000243	LOOM
http://purl.org/biotop/biotop.owl#ProteinComplex	http://biomodels.net/SBO/SBO_0000297	LOOM
http://purl.org/biotop/biotop.owl#MaterialEntity	http://biomodels.net/SBO/SBO_0000240	LOOM
http://purl.org/biotop/biotop.owl#Process	http://biomodels.net/SBO/SBO_0000375	LOOM
http://purl.org/biotop/biotop.owl#Time	http://biomodels.net/SBO/SBO_0000345	LOOM