Acceleron Pharma, a biopharmaceutical company developing novel therapeutics that modulate the growth of tissues including bone and muscle, announced that John Knopf, Ph.D., has been named as CEO. Knopf, a founder of Acceleron, has served as the EVP of corporate development and recently, as president, before being unanimously elected by the board as CEO. Prior to co-founding Acceleron, Knopf was fo