Figure 2. Location of mutations in the pyrE2 and pyrF genes.

Mutations were identified by sequencing 5-FOA-resistant mutants. One-letter code for amino acid is under the gene nucleotide sequence; start and stop codons are boxed with solid lines; putative TATA box is boxed with a dotted line; ▿ indicates insertion of the base(s) specified in parenthesis next to the symbol; ▵ indicates deletion of bases directly located below the symbol; BPS changes are indicated above the sequence in bold; highlighted in green and yellow in pyrE2 are the two 9-nt direct repeats. (A) pyrE2 gene and (B) pyrF gene.