environmental samplesuncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.uncultured Methanobrevibacter sp.