In the absence of auxin, AUX/IAA proteins (blue balls) heterodimerize with auxin response factor (ARF) transcriptional activators (purple balls), thereby preventing the latter from activating auxin-inducible genes with linked upstream AuxRE cassette
In the absence of auxin,AUX/IAA proteins (blue balls) heterodimerize with auxin response factor (ARF) transcriptional activators(purple balls), thereby preventing the latter from activating auxin-inducible genes with linked upstreamAuxRE cassette