The Protein Feature Ontology: a tool for the unification of protein feature annotations.
Gabrielle A. ReevesKaren EilbeckMichele MagraneClaire O'DonovanLuisa Montecchi-PalazziMidori A. HarrisSandra E. OrchardRafael C. JimenezAndreas PrlicTim J. P. HubbardHenning HermjakobJanet M. ThorntonPublished in: Bioinform. (2008)