ANT1, AN2 and MYBL1 were cloned in the prey plasmid pDEST22 and transformed with the bait plasmid pDEST32 (containing JAF13 and AN1). pDEST22 and pDEST32 were used as a negative control. Yeast cells were grown for three days on (A) synthetic complete medium lacking tryphtophan and leucine (-W/-L), (B) on selective medium lacking tryptophan, leucine and uracil (-W/-L/-U) and (C) on Whatman 541 filter papers, saturated 2% X-gal solution.