Immunogen sequence: NKKKSHKSSE GSGKKKLSEQ ASNTYSDSSS MFEPSSPGAG EADTESDDDD DDDDCKKSSM DEGTAGSEAM ATEEMSNLVN. The protein encoded by this gene catalyzes the formation of inositol 1,4,5-trisphosphate and diacylglycerol from phosphatidylinositol 4,5-bisphos