wherein it was suggested
that improved y-PGA yields by B. licheniformis 9945a
were obtained when the pH of the medium is 7.0 or
less.14 Based on the pH values investigated herein, pH
6.5 was found to be preferred for y-PGA production.
Note that the observed changes in y-PGA concentration
at media pH values of 5.5,6.5, and 7.4 are not explained
by changes in cell biomass or cell viability.