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. 2008 Jul 18;190(18):6097–6110. doi: 10.1128/JB.00634-08

FIG. 8.

FIG. 8.

Proteins and amino acid sequence alignments of component of SoxAX-SAXB. The alignment was performed using the program CLUSTALW, version 1.83. Amino acid sequence alignments of predicted SAXB (SoxK) (a), SoxA (b), and SoxX (c) proteins of some bacteria representative of those in Fig. 7 are shown. (a) Amino acid sequence alignments of predicted SAXB (SoxK) proteins and the sequences of loop extension regions of type I SoxXs which are absent in group III SoxXs are compared. In panel c, the sequences of this loop extension region are underlined. (b and c) The sequences in squares have been shown by X-ray crystallography to be important for the formation of complexes between SoxA and SoxX in R. sulfidophilum and P. pantotrophus (3, 15). Asterisks show identical residues; colons show conserved substitutions; dots show semiconserved substitutions.