a bZIP protein that is a target of & interacts with COP1, this interaction results in dark-specific degradation of HYH; HYH is predominantly involved in blue-light regulation of development and gene expression, and that the function of HYH in part overlaps with that of HY5, the accumulation of HYH protein, not the mRNA, is dependent on the presence of HY5; amino acid sequence in first source
