Figure 6

Position and abundance of siRNAs mapped in the boundary region between intron and exon2 of the endogenous CHS-A gene. Data for 21-nt and 22-nt siRNAs in the white petal tissues of J-type (J-w) and Red Star (R-w) plants are shown. DNA sequence in the intron–exon 2 boundary (20 nt of intron and 40 nt of exon 2; nucleotide positions 2731–2790) is shown. Bars above and below the x-axis indicate siRNAs mapped on the sense and antisense strands, respectively. Nucleotide positions of the 5′ end of exon 2, and those of the 3′ ends of antisense siRNAs mapped in this region are indicated. No 22-nt siRNA was mapped in this region in R-w.