valgud, mis seostuvad auksiini poolt reguleeritavate geenide promootorites paiknevate auksiinivastuse DNA elementidega (AuxRe) ja aktiveerivad nende geenide transkriptsiooni, reguleerides kasvu ja arengut, Proteins that bind to the AuxRe elements, located in the promoters of the genes regulated by auxins. They activate the transcription of these genes and through that, regulate plant growth and development. ARF proteins are inhibited by binding to AUX/IAA repressor proteins that are dissolved by auxin.