Immunogen sequence: LSLVGLSWMD WLKQTYPPEH EPSIPENLED KLYGGKLIVA VHFENCQDVF SFQVSPNMNP IKVNELAIQK RLTIHGK. PIK3CB (phosphatyidylinositol 4,5-biphosphate 3-kinase catalyic subunit beta isoform) is a phosphoinositide-3-kinase that phosphorylates PtdIns (pho