väikesed valgud, mis kombineerumisel teiste valkudega moodustavad auksiiniretseptori, Small proteins that can form an auxin receptor by combining with other proteins. They are involved in the regulation of auxin-sensitive gene expression in Arabidopsis by binding to the ARF protein, itself bound to the DNA. ARF is the activator of transcription, Aux/IAA represses it.