Table 2 Characteristics of families possessing a single distinct disulphide that is fully conserved across all members.

a.137.2.1

Methanol dehydrogenase subunit

4

65.2–73.7

Exposed

a.152.1.2

Hypothetical protein TM1620

2

100

Exposed

a.33.1.1

Ectatomin subunits

2

47.1

Buried or partially exposed

b.1.18.4

Class II viral fusion proteins C-terminal domain

2

29.3

Buried

b.12.1.2

Colipase-binding domain

4

53.2–83.1

Exposed

b.16.1.1

Ecotin, trypsin inhibitor

2

95.4

Exposed

b.18.1.2

Discoidin domain (FA58C, coagulation factor 5/8 C-terminal domain)

3

38.2–42

Partially exposed

b.2.2.1

Cellulose-binding domain family II

3

29.5

Buried or partially exposed

b.2.3.5

F17c-type adhesin

2

91.4

Partially exposed

b.29.1.5

Pentraxin (pentaxin)

2

51.5

Buried

b.61.2.1

Metalloprotease inhibitor

2

38

Partially exposed

b.78.1.1

alpha-D-mannose-specific plant lectins

5

48.1–85.2

Buried

c.69.1.24

Dipeptidyl peptidase IV/CD26, C-terminal domain

2

92.6

Buried

d.165.1.2

Shiga toxin, A-chain

2

57.3

Partially exposed

d.233.1.1

Inhibitor of vertebrate lysozyme, Ivy

2

19.7

Partially exposed