Cooccurrence

NCO

Number of domains that are found at least once in the same proteins as the given domain

[7]

Number of neighbours

NN

Number of direct neighbours found for a given domain

[26]

Number of triplets

NTRP

For a given domain A, number of different combinations X – A – Y, where X and Y are domains or N or Ctermini

[12]

Weighted bigram frequency index

π_{
i
}

See original paper for exact definition

[32]

Domain versatility index

DV I

Strength of the relationship between the number of occurrences and the number of neighbours

this study
