Fig. 4. Effect of porcine placenta extract on the serum IgE levels. Blood was obtained from tail vein of mouse and total serum IgE was measured by ELISA kit (BD Biosciences) with serum diluted 200-fold and absorbance was measured at 490nm and plotted. Error bars indicates SD. One (*) asterisk indicates p < 0.05. Data are representative of three independent experiments.