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Isoforms of representative S. mutans proteins differentially expressed following growth at low pH. Cellular proteins extracted from cells of S. mutans cultured at pH 5.2 or 7.0 were resolved by 2-D PAGE; relevant regions of gels are shown expanded. Proteins were identified following peptide mass fingerprinting and comparison with the S. mutans genomic database. (A) EF-G; (B) EF-Tu; (C) 60-kDa chaperonin.
