We further analyzed representative HRR and NHEJ marker proteins, including the levels of BRCA1 and RAD51 (for HRR) and the level of phosphorylated DNA-PKcs at T2609 (for NHEJ), in four lung cancer cell panels with different FHIT statuses and two FHIT-isogenic cell pairs. The gene discussed is BRCA1; the disease is lung carcinoma.