Another glutaminase inhibitor, bis-2-[5-(phenylacetamido)-1,3,4-thiadiazol-2-yl]ethyl sulfide (BPTES), and its analogs significantly diminish growth of tumor xenografts in vivo and proliferation of cancer cells in vitro for several tumor types, including lymphomas, breast cancers, and gliomas [23–27]. The gene discussed is GLS; the disease is cancer.