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Proteomic analysis of influence of external pH on L. lactis CRL264 and CRL30 strains. Protein extracts of exponential-phase cultures grown in M17GC at the indicated pHs. Cultures were analyzed by two-dimensional gel electrophoresis as described in the text. Arrows indicate polypeptides identified by matrix-assisted laser desorption ionization-time of flight analysis after tryptic digest. The names correspond to those used for the proteins listed in Table 2.
