Figure 4

Immunocytochemical detection. The immunocytochemical detection of PrP on CCRF-CEM cells with the phage antibody MA3.B4 is shown. In A and B the immunostaining at two different magnification, in C and D the reactivity of CCRF-CEM cells with two distinct irrelevant phage antibodies (anti glucose oxidase and anti tetanus toxoid, respectively) are shown.