This family consists of the N terminal regions of several plant transcription factors. It is classified as BES1/BZR1, a plant-specific transcription factor that cooperates with transcription factors such as BIM1 to regulate brassinosteroid-induced genes [1].

1: A new class of transcription factors mediates brassinosteroid-regulated gene expression in Arabidopsis. Yin Y, Vafeados D, Tao Y, Yoshida S, Asami T, Chory J; Cell. 2005;120:249-259. PMID:15680330