Pin1 interacts with a subset of phosphorylated RNA binding proteins.

<p>Cell lysates from 293T cells were immunoprecipitated with either an anti-Pin1 or anti-hemagglutinin (HA)-specific antibody. The immunoprecipitates were resolved on a 15% SDS-PAGE and analyzed by western blotting for several ARE-BPs, Pin1, and SLBP. Five percent of the input sample was analyzed in lane 1, proteins bound to the anti-Pin1 antibody in the presence (lane 2) or absence of RNAseA (lane 3), and proteins bound to the anti-HA antibody in the absence of RNAseA in lane 4.