Figure 3. Expression of PAc protein in rats’ tissues after being immunized with pCIA-P by different routes. (A) PAc protein expressed in the sarcoplasm of parallel muscular fibers (lateral section). (B) Transverse section of A. (C) No PAc protein expression in control animals immunized with pCI vector. (D,E) PAc protein expression in both sides of a submandibular gland immunized with pCIA-P by TSG (injection side and opposite side, respectively). (F) No PAc protein in control animals whose TSG were immunized with pCI vector. Magnifications: A,B,C = 100X; D,E,F = 200X.