PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 4149766-1 1973 The use of phosphoenolpyruvate plus pyruvate kinase as an ATP-generating system in the assay for glutamine synthetase activity via the formation of gamma-glutamylhydroxamate from glutamate and hydroxylamine with crude tissue preparations is shown to give values far in excess of the true glutamine synthetase activity of the tissue. Hydroxylamine 193-206 glutamate-ammonia ligase Homo sapiens 97-117