In addition, purified LppZ protein was blotted with human plasma from two TB patients (one with high LppZ-specific IgA-value and one with low LppZ-specific IgA-value according to the results from ELISA), one LTBI individual, one HC, and one non-LTBI lung cancer patient as a disease control (DC). The gene discussed is CD79A; the disease is lung carcinoma.