PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11795521-6 2001 Muscle glutamine synthetase mRNA increased 1.3- and 2.1-fold in young and old CR mice, suggesting increased disposal of nitrogen and carbon derived from protein catabolism for energy. Carbon 133-139 glutamate-ammonia ligase (glutamine synthetase) Mus musculus 7-27 17346854-5 2007 In addition, this will provide the alpha-ketoglutarate carbon skeleton for glutamate and glutamine synthesis by glutamate dehydrogenase and glutamine synthetase (astrocytes only), respectively, both reactions fixing ammonium. Carbon 55-61 glutamate-ammonia ligase (glutamine synthetase) Mus musculus 140-160