Skip to main content

Table 2 Eight logic relationships among three genes a, b, and c [11]

From: Phylogenetically informed logic relationships improve detection of biological network organization

Type Description logic symbols
1 c is present in a genome iff a and b are both present. ca b
2 c is present in a genome iff a is absent or b is absent. c~(a b)
3 c is present in a genome iff a is present or b is present. ca b
4 c is present in a genome iff a is absent and b is absent. c~(a b)
5 c is present in a genome iff a is present and b is absent. ca ~b
6 c is present in a genome iff a is absent or b is present. c~a b
7 c is present in a genome iff one of either a or b is present. ca b
8 c is present in a genome iff a and b are both present or both absent. c~(a b)
  1. Among other possible logic relationships involving three genes, the above eight are most likely to be present in real cellular networks. iff stands for if and only if.