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Multiple alignment of the amino acid sequence deduced from the 1-kbp PCR product encoding the 38-kDa OMP from R. aquatilis (Raq) with the corresponding sequences of mature porins of E. coli (Eco), S. typhi (Sty), and S. marcescens (Sma) OmpC. b strands, β-strands; a helix, α-helix.
