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Nucleotide sequence of the cloned 1,197-bp S. pyogenes sibA gene. Predicted amino acids are shown as single letters under the DNA sequence. The sequence encoding the putative signal peptide is underlined, and the corresponding cleavage site is indicated by a slash in the amino acid sequence. Leucine residues predicted to be involved in the formation of a leucine zipper structure are shown in boldface and underlined.
