TERT and Carcinoma, Lewis Lung: For that purpose, wild-type mice (Tert+/+) and third generation (G3) telomerase-deficient mice (G3 Tert−/−) with short telomeres (C57BL/6 background) [18] were intravenously injected with Lewis Lung Carcinoma (LLC) cells (LL/2 (LLC1) (ATCC® CRL-1642TM)) to generate lung tumors (Fig. 1G–H).