Pe Cling Film For Food,Pe Cling Film,Cling Film Food,Kitchen Pe Cling Film DONGGUAN YEE HUP TRADING CO,.LTD , https://www.yeehupack.com1. With high purity and less impurities, IgG is better than serum antibodies, and Fab is better than IgG. 2. Strong specificity means that anti-IgG and IgG have only one precipitation line on immunoelectrophoresis, and there is only one precipitation line with whole serum of IgG. 3. High potency is generally qualified if the agar diffusion identification is above 1:64.