SCGB1A1 and tuberculosis: Figure 2A revealed intense immunorectivity along the lining of mouse TB. Recently, Wong AP et al. was able to isolate CCSP+ cells from bone marrow using flow cytometry [15]. Therefore, we postulated that CCSP may be expressed not only in the cytoplasm, but also in the cell membrane of Clara cells. To obtain evidence for this, we used the well-known cell membrane marker pan-Cadherin [18]. Indeed, in high magnification photomicrographs we were able to demonstrate co-expression with pan-Cadherin in the cell membrane using confocal microscope (Figure 2B).