2 D gel images of the soluble protein fractions from PA adapted and unadapted S. Enteritidis cultures. (a) Unadapted gel, (b) PA adapted gel. Proteins upregulated in PA gel selected for further examination are circled. Proteins restricted to PA adapted gels are designated with an asterisk (*) in gel (b). Labeled Proteins were identified as (1) CpxR, (2) RplE, (3) RplF, (4) SodA, (5) Dps.