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Table 6. Description of genes present in the variable regions depicted in Figure 4.

From: Genome analyses of the carboxydotrophic sulfate-reducers Desulfotomaculum nigrificans and Desulfotomaculum carboxydivorans and reclassification of Desulfotomaculum caboxydivorans as a later synonym of Desulfotomaculum nigrificans

Variable region

Functions

1A

Transposases, recombinases, transport proteins, isomerases, histidine kinase and threonine dehydrogenase

1B

Transposases, recombinases, resolvase and alcohol dehydrogenase

1C

Helicases, DNA-methylation, endonuclease and recombinase

1D

TRAP transporter, Threonine dehydrogenase, 2 keto-4-petnenoate hydratase, sugar kinase, aldolase, glycerol dehydrogenase and mannonate dehydratase

1E

Pilus assembly, proteases and hypothetical proteins dominate this variable region

1F

Protease, DNA methylase, RNA polymerase, recombinase, cytochrome c biogenesis, Fe2+ transport system and many hypothetical proteins

1G

Transposase, secretory protein secB, nucleotide sugar dehydrogenase, glycosyltransferase, sugar epimerase, O-antigen ligase and copper amine oxidase

1H

Pyruvate ferredoxin oxidareductase, transport proteins, sugar phosphate permease, threonine dehydrogenase, transporsase, DNA methylase and endonuclease

1I

Growth inhibitor protein, terminase, phage portal protein, secretory protein, recombinase and many hypothetical proteins

2A

Endonuclease, DNA methylase, transposase, ATP binding protein, ATPase, threonine kinase, pyridoxamine 5′phosphate oxidase, ferric reductase, many hypothetical proteins and the CODH-ECH complex

2B

CRISPR-Cas

2C

DNA-helicases, -methyltransferase, and -replication protein, restriction protein and many hypothetical proteins

2D

Urea metabolism

2E

Mainly transport proteins and agmatinase

2F

Alpha ribazole phosphatase, metal dependent phosphohydrolase, phenylacetate-CoA ligase, methyltransferase, amine oxidase, aldehyde dehydrogenase, transposase, phage tail component and many hypothetical proteins

2G

Pilus associated proteins

2H

Recombinase, integrase, AAA ATPase, restriction modification system, deoxyribonuclease

2I

Many transferase proteins