Figure 1.

DNA sequence of the chimeric Prrn plastid promoter fragments. A, Prrn promoter with the wild-type and mutant rbcL-TCR. The Prrn promoter sequence is underlined. The transcription initiation site is marked by a horizontal arrow. The translational initiation codon (ATG) is in bold. SD is underlined with a wavy line. Wild-type (wt) sequence is shown on top; mutant sequences (m) are duplicated below. Wild-type nucleotides are in capital letters; mutant nucleotides are in lowercase. B, Prrn promoter with the wild-type and mutant atpB TCR.