Four novel sequence motifs define a sub family of plant coiled-coil proteins. (A) Sequence alignment of motifs I, II, III, and IV. In all four alignments, amino acid residues conserved among all dicot sequences are indicated in black. Amino acids in the rice sequence that match these conserved residues are also indicated in black. All residues are matched by the rice sequence in motifs II, III, and IV, while 6 residues are exchanged in the rice sequence in motif I. Numbers on the left indicate the position of the first residue of each motif in the amino acid sequence of the respective protein. (B) Percent amino acid identity between FPP proteins.