HTATIP2, also known as 30-kilodalton HIV-1 Tat interacting protein (TIP30) or CC3, typically functions as a tumor suppressor and was initially identified in the highly metastatic human variant small cell lung carcinoma (SCLC) in comparison with the less metastatic classic SCLC cell lines[17]. The gene discussed is HTATIP2; the disease is small cell lung carcinoma.