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The basic helix-loop-helix (bHLH) transcription factors (TFs) comprise one of the largest families of TFs involved in developmental and physiological processes in plants. Here, we describe the functional characterization of two bHLH TFs (NtAn1a and NtAn1b) isolated from tobacco (Nicotiana tabacum) flowers. NtAn1a and NtAn1b originate from two ancestors of tobacco, N. sylvestris and N. tomentosiformis...
Tobacco is a commonly used heterologous system for studying combinatorial regulation of the flavonoid biosynthetic pathway by the bHLH–MYB transcription factor (TF) complex in plants. However, little is known about the endogenous tobacco bHLH and MYB TFs involved in the pathway. Ectopic expression in tobacco of heterologous bHLH TF genes, such as maize Lc, leads to increased anthocyanin production...
The N-terminal region of the plant Myc-like basic helix–loop–helix transcription factors (bHLH TFs) contains two domains. Approximately, 190 amino acids at the N-terminus comprise an interaction domain, a.k.a. Myb-interacting-region (MIR) for its primary function of interacting with Myb-like TFs. Following, the interaction domain is an activation (or acidic) domain responsible for transactivation...
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