Table 1. Percentage of PenG Remaining in the Medium after 60 min of Incubation at pH Values from 2 to 7, at 4 and 12 °C.

temp.	pH 2.0	pH 2.5	pH 3.0	pH 4.0	pH 5.0	pH 7.0
4 °C	62.5 ± 2.8	95.8 ± 2.0	100.0 ± 3.4	100.0 ± 3.0	100.0 ± 5.4	100.0 ± 8.1
12 °C	39.0 ± 1.6	71.4 ± 1.5	90.2 ± 3.9	100.0 ± 4.5	100.0 ± 7.8	100.0 ± 6.5