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Phylogenetic distribution of functional genes in GR3 and N. Neighbor-joining analysis was performed with 1000 bootstrap repeats to generate each tree using MEGA 6 software. Phylogenetic tree for (A) dsrB, (B) mcrA and (C) nifH gene segments from GR3 and N samples. Trees were constructed nucleotide sequence of each gene along with their closest BLASTN matches.
