Figure 1.

Alignments of deduced amino acid sequences of Arabidopsis ARRs with that of the E. coli CheY response regulator. (A) The CheY amino acid sequence is shown at the top. Gaps (– – –) were introduced for optimal alignment. Three amino acid residues, which are invariant in the bacterial receiver sequences, are boxed, and the phosphoaccepting aspartate residue is indicated. The extra sequences found in ARRs are also boxed. (B) The genomic structure determined for the ARR6 gene; the sequenced region is indicated by the arrow. The restriction sites in parentheses are from the λgt11 phage vector.