Figure 7.

A proposed model for the GCR1, GPA1, PRN1, NF-Y signal transduction mechanism responsible for BL-induced accumulation of Lhcb RNA. The figure depicts the potential interface between the BL- or ABA-activated GCR1, GPA1, PRN1, NF-Y signal transduction chain and the 5′ untranslated region of Lhcb. The PRN1 protein is depicted as a shuttle protein which upon being activated by BL-excited GPA1, would be capable of entering the nucleus to interact with NF-Y-B9 and NF-Y-A5 and a particular NF-Y-C subunit to facilitate transcription.