Bacterium freundii

They were first described in 1928 by Braak [41] under the designation Bacterium freundii as a group of bacteria forming trimethyleneglycol from glycerol under anaerobic conditions. 

Likewise, a bacterium named Citrobacter freundii has an essential enzyme that moves phosphate from ATP to something else. If manganese binds in magnesium s place, the enzyme changes to form two bonds to the same phosphate, making a little phosphate circle. If the bacterium needs to make phosphate circles, it just ships in a little manganese and an old enzyme performs new chemistry. 

Likewise, a bacterium named Citrobacter freundii. .. I. S4nchez-Moreno et al. From kinase to cyclase an unusual example of catalytic promiscuity modulated by metal switching. 2009. Chembiochem. 10(2), p. 225. DOl 10.1002/cbic.200800573. 

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