Schematic representation of the differently spliced transcripts of MYB homologues. A: The transcribed sequences are shown in red boxes while the spliced fragments are represented as thin lines. B: Representation of LuMYB1 splice variants. The spliced positions are indicated with vertical arrows. The primer positions used for qRT-PCR are shown with horizontal arrows. X indicates conserved but non-functional start codons and the asterisks indicate stop codons. ATG indicates functional start codons. The hypothetical LuMYB1-3 transcript should be formed by splicing at the position indicated by ?.