For example, GCN can be elevated in cancer cells as demonstrated in the epidermal growth factor receptor (EGFR) gene in patients with non-small cell lung cancer (Cappuzzo et al. 2005) and also higher copy number of CCL3L1 has been associated with susceptibility to human HIV infection (Gonzalez et al. 2005). Here, EGFR is linked to non-small cell lung carcinoma.