Fig. 4. A GFP-SAFB2 fusion protein inhibits splicing of a Tra2
variable exon. (A) In vivo splicing activity of SAFB1- and SAFB2-GFP fusion proteins after co-transfection with a minigene containing a Tra2
-dependent variable exon. Splicing activity was monitored using RT-PCR and agarose gel electrophoresis. (B) Quantitative results from three independent experiments.