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A Model of the Transcriptional Network Surrounding GL2 in Root Epidermal Cells.
In N cells (gray color), the WER/MYB23-GL3/EGL3-TTG1 complex activates GL2. GL2 directly suppresses the bHLH transcription factor genes RHD6, RSL1, RSL2, LRL1, and LRL2. In H cells (white color), WER and MYB23 in the complex are replaced by CPC and its paralogs. Consequently, the activation of GL2 doesn’t occur and the bHLH genes remain active to promote various stages of root hair development.
