Figure 4.
Knockdown of GABPI in S2 cells interferes with Golgi localization of β4GalNAcTB. (A–D) S2 cells after 3 d of culture in the absence (A and B) or presence (C and D) of dsRNA directed against GABPI were transiently transfected with Flag-β4GalNAcTA and HA-β4GalNAcTB. The Flag and HA epitopes were detected 2 d after transfection using respective antibodies, and the ER was marked with anti-HDEL. Nuclei were stained with Hoechst 33258.