Figure 2

Double immunostaining using CK5/6 (brown cytoplasmic staining) and CK8/18 (red cytoplasmic staining) (a). A few cells coexpressed CK5/6 and CK8/18. Double immunostaining using CK5/6 (red cytoplasmic staining) and p63 (brown nuclear staining) (b). No cells coexpressed CK5/6 and p63.