Multiple aligned sentences define a consensus pattern. Logo for a motif derived from multiple sequence alignments that can be applied to sentences of unknown content. PTN represents arbitrary protein names, as does P. V and W are interaction verbs in present and past form, respectively; E is a preposition and D a determiner.
Hakenberg et al. Genome Biology 2008 9(Suppl 2):S14 doi:10.1186/gb-2008-9-s2-s14