Table 1 The distribution of SMR homologues into each of the three SMR protein family subclasses within Archaea and Bacteria.

Euryarchaeota

30

40

30

10

10

1

Halobacteria

60

40

5

5

1

Methanomicrobia

40

60

5

5

1

Bacteria

28

32

11

7

8

3

6

4

675

330

2

Actinobacteria

6

43

48

4

54

28

2

Bacilli

13

12

32

25

14

5

81

22

4

Lactobacilli

59

18

24

17

11

2

Bacteroidetes

100

4

4

1

Chlorobia

7

53

40

15

9

2

Flavobacteria

20

80

5

4

1

Clostridia

36

9

18

36

11

7

2

Cyanophyceae

43

14

19

24

21

15

1

Deinococci

63

25

13

6

3

2

Chlamydiales

100

2

2

1

Planctomycetacia

50

50

3

3

1

Chloroflexi

43

14

43

8

7

1

α-proteobacteria

48

45

4

2

1

100

63

2

β-proteobacteria

42

42

7

6

3

71

36

2

γ-proteobacteria

41

25

21

2

2

9

213

95

2

δ-proteobacteria

21

52

21

7

29

13

2

ε-proteobacteria

6

40

54

35

11

3

Total number of sequenced organisms surveyed with SMR

340

Total number of sequenced organisms surveyed

988

Percentage of sequenced organisms with SMR (%)

34