Table 2.

Levels of CAT specific activity in chemostat-grownS. salivarius 57.I derivatives

StrainCAT sp acta
pH 7.0, 20 mM GlcpH 5.5, 20 mM GlcpH 5.5, 200 mM Glc
PureICAT0.23 ± 0.161.93 ± 0.104.09 ± 1.17
PureIΔ100CAT13.98 ± 0.9729.88 ± 0.2919.34 ± 3.18
  • a Values shown are averages from three independent samples. The numbers are expressed as nanomoles of chloramphenicol acetylated per minute per milligram of protein. Negative controls were reactions carried out in the absence of chloramphenicol. Each set of reactions was performed in triplicate.