Table 18.

Kingdom distribution of channel families: α-type (1.A), porins (1.B), and toxins (1.C)

Channel typeDistributionNo. of familiesTC nos.
α-Type channelsUbiquitous3 (or 4)1.A.1; 1.A.8; 1.A.11; (9.A.17)
B31.A.22; 1.A.23; 1.A.45
B, A11.A.23
An161.A.2–1.A.7; 1.A.9; 1.A.10; 1.A.12; 1.A.14; 1.A.21; 1.A.24; 1.A.25; 1.A.27; 1.A.44
Animal viruses11.A.19
An, Y11.A.15
An, Pl11.A.20
Pl31.A.17; 1.A.18; 1.A.26
Y11.A.16
α-AutolysinsB61.A.28; 1.A.29; 1.A.31; 1.A.34; 1.A.41; 1.A.42
Bacteriophages131.A.28–1.A.30; 1.A.32–1.A.40; 1.A.43
β-PorinsB251.B.1–7; 1.B.9–26
E (organelles)11.B.8
Protein toxinsB121.C.1–3; 1.C.5; 1.C.7–1.C.14; 1.C.36
B, Pl11.C.4
Y11.C.6
An11.C.15
Peptide toxinsB121.C.20–1.C.31
An81.C.16–1.C.19; 1.C.32–1.C.35
Total86