GLS, also named as GLS1 and KIAA0838, belongs to the glutaminase family. It catalyzes the first reaction in the primary pathway for the renal catabolism of glutamine. Glutaminase-, glutamate-, and taurine-immunoreactive neurons develop neurofibrillary tangles in Alzheimer's disease.The glutaminase band in AA/C1 cells is more intense than in HT29 cells, in accordance with measurements of glutaminase activity, and had the same molecular mass of approx. 63 kDa(PMID:12408749). Ping Gao et al. (2009) determined that mitochondrial glutaminase expression (GLS, molecular mass of ~58 kDa) is increased ~10-fold in response to Myc. It also reveals a molecular weight of 83-84 kDa as a phosphate-dependent glutaminase(PMID:447624;7512428). GLS has 3 isoforms produced by alternative splicing and this antibody is specific to the 3 isoforms(KGA,GAM,GAC) of GLS.