<i>R2R3MYB</i> genes in Citrus.

<p><i>R2R3MYB</i> genes in Citrus.</p

Schematic of the intron distribution patterns within the MYB domains of 101 CitMYBs.

<p>Alignment of the MYB domains is representative of 12 intron patterns, named from P1 to Pl2. The locations of introns are indicated by white triangles. The number within each triangle indicates the splicing phases: 0 refers to phase 0; 1 refers to phase 1; and 2 refers to phase 2. The number of CitMYB proteins with each pattern is shown on the right.</p

ClustalW amino acid sequence alignment of 101 citrus R2R3-MYB domains.

<p>The shading of the alignment represents different degrees of conservation among sequences; the dark shading indicates identical residues, the light shading indicates conservative changes. The positions of the three a-helices that form each MYB repeat are marked as Helix 1 to Helix 3.</p

Phylogenetic relationships, intron pattern, expression pattern, and subgroup designations in R2R3MYB proteins from citrus.

<p>A, The neighbor-joining (NJ) tree based on the complete protein sequences of 101 CitMYBs and the bootstrap values less than 50 are not shown in NJ tree. The tree shows the 21 phylogenetic subgroups (C1–C21) marked with colored backgrounds. Twelve proteins did not fit well into clusters. B, The gene structure is presented by exon (black boxes) and intron (black line between the black boxes). The number indicated the phases of corresponding introns. C, The expression patterns of 101 CitMYB genes in different organs. The letter R above the column of expression data refers to root, L refers to leaf, F refers to flower and G refers to fruitlet.</p