University of Texas System Chancellor J.B. Milliken is stepping down at the end of this month to lead the University of California, the West Coast institution's Board of Regents announced Friday afternoon.

University of Texas System Chancellor James B. Milliken departure comes as the system loses other longtime leaders, including presidents at the UT Austin

Former state Rep. John Zerwas will temporarily replace Chancellor JB Milliken in leading the 256,000-student university system.