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Fig. 3 | BMC Microbiology

Fig. 3

From: Analysis of nifH DNA and RNA reveals a disproportionate contribution to nitrogenase activities by rare plankton-associated diazotrophs

Fig. 3

Unrooted neighbor-joining phylogenetic tree based on the nifH amino acid sequences of the 20 most abundant OTUs and reference sequences. The bootstrap values (> 50%) of relevant nodes are shown based on 1000 replicates. Sequences from this study are shown in bold. Scale bars: 5% of the estimated sequence divergence. The number in square brackets refers to the studies in which the reference sequences were previously reported

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