Department of Chemical and Systems Biology, Stanford University, Stanford, California, USA. sbandara@stanford.edu|Department of Chemical and Systems Biology, Stanford University, Stanford, California, USA. sbandara@stanford.edu|Department of Chemical and Systems Biology, Stanford University, Stanford, California, USA. sbandara@stanford.edu|Department of Chemical and Systems Biology, Stanford University, Stanford, California, USA. sbandara@stanford.edu|Department of Chemical and Systems Biology, Stanford University, Stanford, California, USA. sbandara@stanford.edu