Figure 4.

Positional cloning of crr3. A, Structure of CRR3. Exons (boxes) and introns (horizontal lines) were determined by direct sequencing of the reverse transcription-PCR products. Position of the crr3 mutation (asterisks) is indicated. B, Alignment of CRR3 homolog sequences. Predicted cleavage site of the target signal (TargetP) is indicated by a vertical arrow. Arabidopsis CRR6 (At) and its rice homolog (Os) are aligned. The rice sequence was predicted from the genome information. The position of the crr3 mutation is indicated by an asterisk. A horizontal bar indicates the transmembrane domain.