Arabidopsis bHLH transcription factor PIF1 has been shown function as a negative regulator of Chlorophyll biosynthesis. Pif1-2 mutant accumulate more protochlorophylide during prolonged dark growth condations, therefore the comparation between Wt and pif1-2 mutant will help us find the PIF1 target genes in Chlorophyll biosynthesis pathway at genome wide level under the dark grown conditions.
PIF1 directly and indirectly regulates chlorophyll biosynthesis to optimize the greening process in Arabidopsis.
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