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. Author manuscript; available in PMC: 2011 Apr 5.
Published in final edited form as: Mol Pharm. 2010 Apr 5;7(2):412–420. doi: 10.1021/mp900193e

Fig. 2.

Fig. 2

Uptake of different P-gp substrates into MDCK-MDR1 cells in DPBS buffer containing 0 mM, 15 mM, and 25 mM HEPES. A: [3H]ritonavir; B: [3H]lopinavir. Results were expressed as mean ± SD, n = 4 – 8. * p < 0.05; ** p < 0.01 (from control, 0 mM HEPES).