Institution: | (1) Department of Medicine, The University of Chicago, 60637 Chicago, Illinois, USA;(2) Department of Biochemistry, The University of Chicago, 60637 Chicago, Illinois, USA;(3) Department of Biology, The University of Chicago, 60637 Chicago, Illinois, USA;(4) Department the Franklin McLean Memorial Research Institute, The University of Chicago, 60637 Chicago, Illinois, USA;(5) Present address: The Biological Laboratories, Harvard University, 02138 Cambridge, MA |