I have had excellent results with P16 (JC8) from Santa Cruz Biotech. http://www.scbt.com/datasheet-56330-p16-jc8-antibody.html Tony Auge HTL (ASCP) QIHC Histology Supervisor - Chandler Pathology Services Cell: (651) 373-4768 Email: tony.auge <@t> gmail.com