The At1g49770 product is a putative transcription factor that has a bHLH domain. A, Alignment of the At1g49770 product and its homologs. The full-length amino acid sequence of the At1g49770 product was aligned with those of Medicago, Oriza, and Vitis. All alignments were performed using ClustalW software. The bHLH domain, important amino acids for DNA binding, and putative nuclear localization signal are indicated by the bold underline, blue dots, and red box, respectively. B and C, Localization of At1g49770 product:GFP fusion protein. The fluorescence of only GFP (B) and At1g49770 product:GFP (C) are indicated. These images are merged with those of red chlorophyll fluorescence.