Wayne D Hawkins1,2, Daniel J Klionsky3,4. 1. Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA. 2. Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA. 3. Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA. klionsky@umich.edu. 4. Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA. klionsky@umich.edu.