FIG. 2.

Alignment of the T. maritima ATCase sequence with the E. coli and T. denticola ATCases. Residues forming the catalytic site in E. coli are in boldface; those involved in the regulatory site as well as the four cysteines coordinated with the zinc atom are underlined. The nucleotide sequence upstream of the T. maritima pyrB::I gene is given, with the putative promoter sequence (−35 and −10) and the putative ribosome binding site (RBS). Asterisks, identities; dots, conservative substitutions.