Fig. 5From: Sex-specific differences in organic anion transporting polypeptide 1a4 (Oatp1a4) functional expression at the blood–brain barrier in Sprague–Dawley ratsDifferences in Oatp1a4 expression at the BBB in male and castrated male Sprague–Dawley rats. Western blot showed a previously reported Oatp1a4 band of 90 kDa and band related to tubulin at 50 kDa. While tubulin expression is the same between sexes, castrated males (C1–6) show an approximately 4.0-fold higher expression of Oatp1a4 as compared to control male animals (M1–6). Results are expressed as mean ± SD of the ratio of Oatp1a4 protein expression to tubulin protein expression from six animals per treatment group. MWM molecular weight marker. **p < 0.01Back to article page