Moreover, the content of GSH in some tumor cells is typically associated with higher levels of GSH-related enzymes, such as γ-glutamylcysteine ligase (GCL) and γ-glutamyl-transpeptidase (GGT) activities, as well as a higher expression of GSH-transporting export pumps [11, 12]. The gene discussed is GCLC; the disease is neoplasm.