Hello Histonetters, Is anyone doing teh CD52 on PPFE tissues? If so, would you share your vendor and protocol? I have tried several different things and cannot seem to get good staining. Thanks in advance. Colleen Forster HT(ASCP)QIHC Department of Laboratory Medicine and Pathology B173 PWB, MMC76 516 Delaware St. SE Minneapolis, MN 55455 612-626-1930 612-626-4660(f)