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. Author manuscript; available in PMC: 2009 Aug 31.
Published in final edited form as: Invest Ophthalmol Vis Sci. 2004 Sep;45(9):2906–2914. doi: 10.1167/iovs.03-1355

Figure 4.

Figure 4

Effect of Tat on the steady state mRNA and protein levels of xCT and 4F2hc. (A) Northern blot analysis of steady state levels of mRNA for xCT and 4F2hc in control ARPE-19 cells (Control) and in Tat-expressing ARPE-19 cells (TAT). The same blot was analyzed for OCTN2 mRNA as an internal control. (B) Western blot analysis of xCT and 4F2hc protein levels in control ARPE-19 cells (C) and in Tat-expressing ARPE-19 cells (Tat). The same blot was analyzed for ERK2 protein levels as an internal control.