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ClustalW alignment (http://www.ch.embnet.org/index.html) of the predicted peptide sequences of EatA and its closest homologue, the Shigella flexneri protein SepA. Regions shaded black indicate identity. The two proteins have several features in common with other SPATE proteins, including an extended signal peptide and a putative serine protease site within the proposed passenger domain. Amino acids which form part of the serine protease catalytic triad are indicated (*).
