Figure 1.

Alignment of different as-1-like elements from viral promoters (as-1; 2), T-DNA promoters [ocs, nos (8); mas (9)] and plant genes [ParA (12); Nt103 (14); GH2/4 (6); GST6 (15); PR-1a (18); PR-1 (17)]. Palindromes are shown in capital letters, the sequence of the spacer is shown in small letters. Positions that are not defined in the consensus sequence are indicated with n. The TGAC half sites of the 8 bp palindromes are marked by arrows. TGAC sequences carrying one mutation are marked by interrupted arrows, half sites with more than one mutations are not marked. The central 4 bp (ACGT in the consensus sequence) are indicated by bold letters. The centres of the palindromes are marked by vertical lines.