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Table 1 Distribution of the SPFH subfamily members within different bacterial phyla.

From: Evolution of prokaryotic SPFH proteins

Bacteria (*)\SPFH subgroup 1a 1b 2a 2b 2c 3a/b 4 5 6 7 8 9 10 11a/b 12
Actinobacteria (42) 32 - 14 - 2 - - - 11 5 4 2 5 - 2
Aquificae (1) - 1 - - - - - - - - - - - - -
Bacteroidetes/Chlorobi (27) 2 6 4 1 5 1 14 5 5 10 6 1 1 - -
Chlamydiae (8) - - - - - - - 1 - - - - - - -
Chloroflexi (8) - 8 - - - - 5 - - - 2 - - 4 -
Cyanobacteria (31) 19 - 8 - - - 30 - - - 1 5 - - 4
Deinococcus-Thermus (2) 1 - 1 - - - 1 - 1 - - - - - -
Acidobacteria (2) - 2 2 - - - - - - - 1 1 - 1 -
Firmicutes (73) 14 2 24 - - 7 4 23 19 11 14 1 - - 2
Fusobacteria (3) 3 - 1 - - - 1 - - - - - - - -
Planctomycetes (3) - - 1 - 2 - - 3 1 - 3 2 - 1 -
Alphaproteobacteria (87) 54 10 - 15 - 81 3 - 15 - 22 3 4 - 2
Betaproteobacteria (40) 33 25 - 3 - 38 6   - - 12 7 1 - 2
Deltaproteobacteria (21) 12 12 2 - 3 10 4 - - - 15 2 3 1 1
Epsilonproteobacteria (15) 3 - - - - - 15 - - - - - - - -
Gammaproteobacteria (113) 75 31 - 16 8 104 15 - 7 2 3 8 1 - -
Spirochaetales (7) 3 - - - - 5 2 - - - 3 1 - - -
Thermotogae (6) 5 - - - - 5 - 1 - - - - - - -
absolute numbers 256 97 57 35 20 251 100 33 59 28 86 33 15 7 13
  1. As the vast majority of all sequenced bacterial genomes belong to the phylum proteobacteria, we have subdivided this phylum into its respective classes.