FIG. 2.

Comparison of the amino acid sequence encoded by pyc with sequences of the large subunit of acetohydroxyacid synthases of Spirulina platensis (P27868), M. jannaschii (Q57725), S. coelicolor (E1390257), and E. coli (P00893). Shaded boxes contain identical amino acids. Amino acids which form part of the active center of acetohydroxyacid synthase (7) are indicated by dots. The box extending from amino acids 452 to 478 corresponds to the conserved thiamine pyrophosphate binding motif, with the consensus amino acids in the motif indicated with bars.