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Fig. 7. The proposed role of GL3 and EGL3 in epidermal cell
specification. In the N cell position, there is a relatively high level of WER
relative to CPC, which enables a WER-GL3/EGL3 complex to form and promote GL2
and CPC transcription. In the H position, a relatively high level of CPC leads
predominantly to formation of the inactive CPC-GL3/EGL3 complex. Proteins
shown in white ovals are at low concentrations. See text for detailed
discussion.