<http://webisa.webdatacommons.org/concept/erythrocyte_protoporphyrin_>	<http://webisa.webdatacommons.org/ontology#hasHead>	"protoporphyrin" .
<http://webisa.webdatacommons.org/concept/erythrocyte_protoporphyrin_>	<http://webisa.webdatacommons.org/ontology#hasPreModifier>	"erythrocyte" .
<http://webisa.webdatacommons.org/concept/erythrocyte_protoporphyrin_>	<http://www.w3.org/2000/01/rdf-schema#label>	"erythrocyte protoporphyrin" .