Figure 3. Effect of the pH of the medium on the uptake of L-[³H]carnitine by HCLE or HCjE cells at 37 °C. HCLE or HCjE cells were pre-incubated for 60 min in uptake buffer of different pH values at 37 °C; L-[³H]carnitine (24 nM) was then added and incubation was continued for 30 min. Each value is the mean±SD of results from three experiments. #p<0.005 for HCLE and 0.002 for HCjE cells respectively compared with medium at pH 7.4. *p=0.002 for HCLE and, p=0.007 for HCjE, respectively compared with medium at pH 7.4.