Immunogen sequence: TQVFYNHMQK HKPYPSIEEF LVRDGRLNVD YKALNRSLYH VHMQNWLRFF PLRHIHIVDG DRLIRDPFPE IQKVERFLKL SPQINASNFY FNKTKGFYCL RDSGRDRCLH ESKGRAHPQV DPKLLNKLHE YFHEPNKKFF ELVGR. HS3ST1 is the rate limiting enzyme for synthesis of HSact. HS3ST1 perform