Figure 8.
Effect of HA-TIA-1ΔRRM on arsenite-induced assembly of SGs. COS cells were transiently transfected with recombinant HA-TIA-1ΔRRM, allowed to express protein for 48 h, and either untreated (A and C, paired views of same fields) or treated (B and D–F, paired views of same fields) with 0.5 mM sodium arsenite for 1 h before fixation and double staining for poly(A)+ RNA by in situ hybridization (C and D), and either HA-TIA-1ΔRRM (A, B, E) or endogenous TIAR (F) by immunofluorescence microscopy using mAbs reactive with the HA tag (A, B, and E) or endogenous TIAR (6E3). Arrows point out transfected cells. Bar, 10 μm.