Fig. 1. Structure and deduced amino acid sequence of PDF2. (A) Genomic
structure of PDF2 and ATML1. Black boxes represent exons.
Start ATG and termination codons are indicated. T-DNA insertion sites in
pdf2-1 and atml1-1 are shown. The upstream regions of both
genes contain L1 box sequences (gray boxes) associated with putative WUS
target sites (underlined). (B) The predicted amino acid sequence of the PDF2
protein. The boxed area indicates a homeodomain. Amino acids forming a ZIP
motif are shaded. A START domain is underlined.