Immunohistochemical staining of reprogramming factors in shams operated and one day after PHx livers. Representative photomicrographs of (a) REST, (b) Oct4, (c) Nanog, (d) Klf4, and (e) Myc. (Original magnification 100X for a–c, and e. d:200X). All proteins show an increase in nuclear presence after PHx, except for KLF4.