About: http://webisa.webdatacommons.org/337733498

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Methods for isolating and purifying antigens are well known in the art and include methods such as gel filtration, affinity chromatography, ion exchange chromatography, or centrifugation.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com