Table 4.

Comparison of aphB expression in classical and El Tor biotypes

Strainβ-Galactosidase activitya at pH and temp:
AKI mediumLB medium
6.5, 30°C8.5, 30°C6.5, 37°C8.5, 37°C
GK130 (classicalaphB-lacZ)201 ± 6176 ± 3129 ± 1100 ± 378 ± 1
GK142 (El ToraphB-lacZ)223 ± 2207 ± 2137 ± 198 ± 683 ± 7
  • a Units per optical density at 600 nm of culture.