Tetraphase Pharmaceuticals, Inc. announced the appointment of Maria Stahl to the position of senior vice president and general counsel. Prior to joining Tetraphase, Ms. Stahl served as senior vice president, general counsel and secretary of Idenix Pharmaceuticals since October 2010. Ms. Stahl served as Idenix's vice president, associate general counsel from February 2008 to November 2009 and as assistant general counsel from February 2007 to February 2008.

Prior to rejoining Idenix, Ms. Stahl served as general counsel of Zipcar, Inc.