Fig. 2.

Peptide wrwycr/acid treatment. The impact of temperature, time and peptide concentration on survival of STEC strain 86-24 after 5 min incubation with PBS (black bars), 25 µM wrwycr (grey bars), 50 µM wrwycr (dark-grey bars, c only) or 75 µM wrwycr (white bars, c only) followed by timed acid stress exposure. Both wrwycr and acid stress incubations were conducted at room temperature (a), 30 °C (b) or 37 °C (c). Asterisks indicate a peptide treatment with a statistically significant difference relative to untreated control, confidence interval 95 %. U, Unstressed. Error bars indicate sd.