Hello I'm new to intracellular FACS staining of cells and I'm now trying the saponin permeabilization but have no idea of what saponin product should I choose to order. The permeabilization buffer, according to a published paper that did the same thing with me, is composed of PBS+ 0.1% BSA+ 0.05% saponin, but they didn't show the catlog number of the saponin...Can anyone who has done saponin permeabilization give me some suggestions about either the product or the experiment? Thanks a lot!