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. 2016 Aug 10;7:1252. doi: 10.3389/fmicb.2016.01252

Figure 5.

Figure 5

Abundance of subsystems involved in heavy metal homeostasis among all subsystem-annotated metagenomic reads. Heavy metal resistance includes the following subsystems: arsenic resistance, resistance to chromium compounds, zinc resistance, cadmium resistance, cobalt-zinc-cadmium resistance, copper homeostasis, mercuric reductase, mercuric resistance operon, and tellurite resistance: chromosomal determinants.