Figure 3.
Immunostaining for key Notch proteins in airway epithelial biopsies. (A) Chronic obstructive pulmonary disease (COPD) smoker, goat anti-human Jag1 antibody. (B) COPD smoker, goat anti-human Jag1 antibody plus Jag1 peptide. (C) COPD smoker, rabbit anti-human Notch2 antibody. (D) COPD smoker, rabbit anti-human Notch2 antibody plus Notch2 peptide. (E) Normal nonsmoker, rabbit anti-human Hes1 antibody. (F) Normal nonsmoker, rabbit anti-human Hes1 antibody plus Hes1 peptide. (G) Normal smoker, rabbit anti-human Hes5 antibody. (H) Normal smoker, rabbit IgG control.