The sequence of C. reinhardtii rbcL from +1 (the
transcription start site) through +350. Translation starts at +93. The
basic promoter of this gene extends to +63 (2) and a transcriptional
enhancer sequence lies between +63 and +170 (2). In some of the present
experiments reporter genes were tested that contained the first 10 (+1
to +10), 20 (+1 to +20), 41 (+1 to +41), or 62 (+1 to +62) nucleotides
of rbcL introduced downstream of the C.
reinhardtii chloroplast atpB promoter (Figs. 3
and 4). In other experiments (Figs. 6 and 7), reporter genes were
tested that contained the −709 to +350 segment of rbcL
followed by a uidA (GUS) or aadA protein
coding sequence and the 3′ terminal sequence of the psaB
gene. Except for the control reporter, each reporter gene had a
mutation at ST27, ST3, ST4, ST5, ST6, ST7, ST9, ST11, ST12, ST14, ST15,
or ST30. A reporter gene with mutations at both ST27 and ST30 was also
tested. Each mutagenized region is over- or underlined, and the
nucleotides substituted within each mutated region are shown.