Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no|Microbial Evolution Research Group, Department of Biology, University of Oslo, Norway. surendra.kumar@bio.uio.no