United States Biological's Pab Rb x human CIITA (Class II Transactivator, Class II, Major Histocompatibility Complex, Transactivator) antibody is a Rabbit Polyclonal antibody. This antibody has been shown to work in applications such as: Western Blot. The Pab Rb x human CIITA (Class II Transactivator, Class II, Major Histocompatibility Complex, Transactivator) antibody was generated using CIITA as the antigen and it reacts with Homo Sapiens, and Human.