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PBECs (Epi) secrete various growth factors on differentiation at ALI. Primary bronchial epithelial cells (PBECs, Epi) were differentiated at air liquid interface (ALI). Supernatant collected after differentiation was assayed for various proteins using magpix. Histograms depict the growth and other factors, which displayed significant increase over media alone. Data is mean +/− S.E. of four experiments. PBECs from three different subjects were used for this assay
