DmeF, a metal efflux transporter belongs to the cation diffusion facilitator (CDF) family. Examples from different species have been described as primarily being induced by, or performing efflux of, different panels of metals, including Co(II) and Ni(II) for Rhizobium leguminosarum and Agrobacterium tumefaciens, and a broader spectrum Wautersia metallidurans CH34.