<http://webisa.webdatacommons.org/prov/463183120>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/340161533> .
<http://webisa.webdatacommons.org/340161533>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/340161533>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/340161533>	<http://www.w3.org/ns/prov#value>	"Polypeptides or other compounds described herein are said to be ???substantially pure??? when they are within preparations that are at least 60% by weight (dry weight) the compound of interest." .