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The B3 DNA binding domain (DBD) is a highly conserved domain found exclusively in transcription factors, from higher plants (≥40 species) () combined with other domains (). It consists of 100-120 residues, includes seven beta strands and two alpha helices that form a DNA-binding pseudobarrel protein fold (); it interacts with the major groove of DNA.〔 == B3 families == In ''Arabidopsis thaliana'', there are three main families of transcription factors that contain B3 domain: * ARF (Auxin Response Factors) * ABI3 (ABscisic acid Insensitive3) * RAV (Related to ABI3/VP1) and are only known NMR solution phase structures of the B3 DNA Binding Domain. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「B3 domain」の詳細全文を読む スポンサード リンク
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