recombinant/native protein, pik3ca/pik3r1 (human) recombinant protein, human pik3ca (np_006209.2, 1 a.a. - 1068 a.a.) and pik3r1 (np _852664.1, 1 a.a. - 724 a.a.) with gst tag expressed in baculovirus infected sf21 cells. 1 * 20 µG