b. c. a. IP WB: -PABP Input R-IgG R-IgG R-IgG R-IgG R-IgG PABP PABP PABP PABP PABP pcDNA Sam68C 28C 5-262 Ab: 72 95 IP 72 PABP-Associated unspliced RNA pcDNA Sam68C 28C 5-262 * 0.0 0.5 1.0 1.5 2.0 * pcDNA Sam68C 28C 5-262 pcDNA Sam68C 28C 5-262 R-IgG R-IgG R-IgG R-IgG R-IgG PABP PABP PABP PABP PABP } } } } } Input us-uc us-c s-uc s-c Cmin Cmin Cmin Cmin