Microbial Genomics Group, Max Planck Institute for Marine Microbiology, D-28359 Bremen, Germany. hteeling@mpi-bremen.de <hteeling@mpi-bremen.de>|Microbial Genomics Group, Max Planck Institute for Marine Microbiology, D-28359 Bremen, Germany. hteeling@mpi-bremen.de <hteeling@mpi-bremen.de>|Microbial Genomics Group, Max Planck Institute for Marine Microbiology, D-28359 Bremen, Germany. hteeling@mpi-bremen.de <hteeling@mpi-bremen.de>|Microbial Genomics Group, Max Planck Institute for Marine Microbiology, D-28359 Bremen, Germany. hteeling@mpi-bremen.de <hteeling@mpi-bremen.de>|Microbial Genomics Group, Max Planck Institute for Marine Microbiology, D-28359 Bremen, Germany. hteeling@mpi-bremen.de <hteeling@mpi-bremen.de>