Fig. 4.

Kinetics of l-[³H]glutamine accumulation and efficacy of l-[³H]glutamine to l-[³H]glutamate conversion in astrocyte cultures. A: time course of total l-[³H]glutamine accumulation and intracellular l-[³H]glutamine to l-[³H]glutamate conversion. Data are the mean values ± SE of 5 experiments. B: relative efficacy of l-[³H]glutamine to l-[³H]glutamate conversion at different incubation times. These data were derived from those presented in A, the conversion values were normalized to the total isotope content at each time point.