Extended Data Figure 2: Metagenome binning.
a, b, Extraction of the Nitrospira sp.1 (a) and sp.2 (b) genome sequences from the metagenome using differential coverage binning. Each circle represents a metagenomic scaffold, with size proportional to scaffold length; the plots contain a total of 47,584 scaffolds. The inlay of each figure shows the secondary binning based on tetranucleotide frequencies, with a total of 331 (a) and 281 (b) scaffolds included. Taxonomic classification is indicated by colour; a total of 3,158 essential marker genes were detected. The extracted bins are enclosed by a dashed line. c, d, Genome contaminations were excluded by generating linkage maps of the final bins of sp.1 (c, 25 scaffolds) and sp.2 (d, 86 scaffolds) using mate-pair sequencing data.
