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. 2014 Jul 7;9(7):e101648. doi: 10.1371/journal.pone.0101648

Figure 2. A phylogenetic tree of ammonia-oxidizing archaea 16S rRNA gene sequences (about 1.4 kb).

Figure 2

23 16S rRNA sequences of AOA were randomly selected from the National Center for Biotechnology Information databases. Conservative sites (1.08 kb) were selected using Gblocks. The branching patterns in the maximum-likelihood tree are denoted by their respective bootstrap values (1000 iterations).