Fig. (3) Phenotypic Growth Properties on Lactose: (a) Growth rate on lactose medium for cells exposed to either galactose or glucose as carbon source in pre-culture. (b) Percentage relative reduction in growth rate for cells which are exposed to glucose in pre-culture as compared to the ones which are exposed to galactose in pre-culture on lactcose medium. (c) β-galactosidase activity for cells. The glucose and galactose written on X-axis represents the carbon source in pre-culture. The concentration of lactose used is 5 mM.