FIG. 2.

Sequence alterations of Mtz^r mutations. The DNA sequence of strain 11639 covers the entire rdxA coding region and extends slightly upstream (top line) and downstream (bottom line). The rdxA gene encodes 210 amino acids, and the positions of codons are on the left. The lowercase letters above the sequence indicate the nucleotides in the 26695 rdxA gene that diverge from the rdxA gene of 11639. Nucleotide changes in the Mtz^r mutants are indicated by the arrows below the wild-type sequence. The corresponding allele numbers and amino acid changes are given in parentheses (fs, frameshift). Note that in the allele rdxA12, 14 nucleotides (TTGCAGCACACAGC) are inserted, which is the duplicate of the overlined sequence.