MYBBP1A is down-regulated in recurrences of squamous cell carcinoma. (A-D) Immunohistochemical analysis of mouse tumor sections with an anti-Mybbp1a antibody revealed specific staining (red signal) in nuclei of tumor cells. Counterstaining was done using hematoxylin. Scale bars, 50 μm. (E) Positive stained nuclei were quantified and plotted as percentage total (*** p-value = 0.0001).