A nucleic acid molecule comprising a nucleotide sequence selected from the group consisting of nucleotide sequences set forth in SEQ ID NO: 1-6 and 11, particularly SEQ ID NO: 3. The nucleotide sequence encodes at least a corresponding amino acid sequence set forth in SEQ ID NO: 12-17 and 26. The nucleic acid sequences and corresponding amino acid sequences regulate the flavonoid pathway, and more particularly they regulate the proanthocynanidin biosynthetic pathway and proanthocynanidin biosynthesis in a plant. One embodiment relates to methods of producing transformed plants comprising introducing into a cell of a plant a nucleic acid sequence selected from the group consisting of SEQ ID NO: 1-6 and 11, particularly SEQ ID NO: 3 and regenerating a transformed plant from the transformed cell. Another embodiment relates to a host plant cell comprising at least one of the nucleic acid sequences set forth in SEQ ID NO: 1-6 and 11.