The mxd operon in Shewanella oneidensis MR-1 is induced in response to starvation and regulated by ArcS/ArcA and BarA/UvrY.

Background: S. oneidensis MR-1 is a dissimilatory metal-reducing bacterium. Under anoxic conditions S.

Choline uptake in Agrobacterium tumefaciens by the high-affinity ChoXWV transporter.

Agrobacterium tumefaciens is a facultative phytopathogen that causes crown gall disease. For successful plant transformation A. tumefaciens requires the membrane lipid phosphatidylcholine (PC), which is produced via the methylation and the PC synthase (Pcs) pathways.