Premodifier: affinity
Head noun: purification

Same concepts
http://dbpedia.org/resource/Affinity_chromatography

Broader concepts

labelprovenanceconfidence
protein interactionisap:5135203910.709177
methodisap:812806040.546521
procedureisap:1128213280.457146
solid phaseisap:683879010.276458

Narrower concepts

labelprovenanceconfidence