CHEMROF	Breast Tissue Cell Lines Ontology	Source
https://w3id.org/chemrof/Lipid	http://purl.obolibrary.org/obo/MCBCC_0000261#Lipid	LOOM
https://w3id.org/chemrof/Protein	http://purl.obolibrary.org/obo/MCBCC_0000015#Protein	LOOM
https://w3id.org/chemrof/ElementFamilyEnum#Transition	http://purl.obolibrary.org/obo/MCBCC_0000325#Transition	LOOM