FIG. 1.

Sequence alignment of the four ferredoxins considered in the present study. Sequences were aligned using the GeneWorks software (version 2.5N) from IntelliGenetics. Identical residues are shaded. Cysteines presumed to serve as ligands for the [2Fe-2S] cluster are indicated in boldface. The sources, accession numbers, and references for each sequence are as follows: XylT-MT2, XylT from P. putida mt-2 (M64747) (8); DmpQ-CF600, DmpQ from Pseudomonas sp. strain CF600 (X60835) (28); PhhQ-P35X, PhhQ from P. putida P35X (X79063) (23); and NahT-KF715, NahT from P. putida sp. strain KF715 (S78585) (22). The XylT sequence was modified to take into account a correction of the gene sequence resulting in an alanine-to-glycine replacement of residue 76 (12).