Fig. 6. The expression of growth regulators in Hair-Bmpr1a KO mice and control mice. Expression of EGFR, notch, TRAF6, PDGFR and Met in HFs from P30 Hair-Bmpr1a KO mice and P30 control mice (as indicated) was analyzed by immunohistochemistry (shown in green for antibodies, Hoechst blue for EGFR, notch and TRAF6; brown for antibodies for PDGFR and Met). The expression levels of all of these regulators in Hair-Bmpr1a KO mice were comparable with those in control mice. No signal was detected in negative controls (normal goat serum was the control for anti-EGFR, notch, TRAF6, and Met goat polyclonal antibodies; no primary antibody was used as a control for anti-PDGFR monoclonal antibody). Scale bars: 100 µm.