rRNA and Poly-Hydroxybutyrate Dynamics in Bioreactors Subjected to Feast and Famine Cycles Dominic Frigon,† Gerard Muyzer, Mark van Loosdrecht, and Lutgarde Raskin* Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, and Environmental Biotechnology Group, Department of Biotechnology, Delft University of Technology, Delft, The Netherlands