HY5 Negatively Regulates FHY1 Protein Levels.
FHY1 protein levels in 4-d-old fhy1, wild-type (WT), hy5, fhy3 far1, and phyA seedlings grown in darkness (D) or continuous FR, R, and B light conditions. The two arrowheads indicate two endogenous FHY1 bands in immunoblots recognized by our FHY1 antibodies (Shen et al., 2009). Anti-RPT5 was used as a sample loading control.