Comparison of JcFT and other FT -like genes. (A) Gene structures of JcFT, Hd3a, and AtFT. Boxes indicate exons and thin lines indicate introns. Exon sizes are indicated above each box. (B) Sequence alignment of amino acid sequences. Identical amino acid residues are shaded in black, and similar residues are shaded in gray. Dots denote gaps. Boxes indicating the 14-amino-acid stretch (segment B) and the LYN triad (segment C), and "Y" indicating the highly conserved amino acid Tyr (Y).