Oral immunization of animals with transgenic cherry tomatillo expressing HBsAg

Figure 6 Serum antibody response elicited by oral boost with transgenic cherry tomatillo. A: Mouse was primed parenter-ally with 2 µg commercial rHBsAg, and when its serum anti-body level descends to OD < 1.0, mouse was fed with untransformed tissues; B.C.D: Mice were primed parenterally with 2 µg yeast-derived rHBsAg, and when their serum anti-body levels descend to OD < 1.0, mice were fed with transformed tissues as boost.