Tyrosine-phosphorylated proteins were immunoprecipitated (P-Tyr IP) from cell lysates (lysate) and analyzed for hnRNP A2 and hnRNP E1/E2. HnRNP A2 immunoprecipitates from cells transfected with active Fyn, whereas hnRNP E1/E2 is absent. Mouse brain lysate and antibody beads alone served as blotting controls. Note that the hnRNP A2 antibody also recognizes the splice variants hnRNP B1 and B0a. HC and LC, heavy and light chain of mouse anti-phosphotyrosine antibody used in the immunopreciptiation. Black lines indicate that intervening lines have been spliced out. (B) Endogenous hnRNP A2 was immunoprecipitated from Oli- cells and subjected to an in vitro kinase assay using purified recombinant Fyn kinase. The top shows a phosphotyrosine blot and a band at 36 kD only in the presence of recombinant Fyn. This was identified as hnRNP A2 by reblotting with an hnRNP A2 antibody (bottom). Numbers to the right of the gel blots indicate molecular mass in kD. (C) HnRNP A2 coimmunoprecipitates with Fyn from Oli- cells transfected with wild-type Fyn, whereas a control protein (α-tubulin) does not.<p><b>Copyright information:</b></p><p>Taken from "Activation of oligodendroglial Fyn kinase enhances translation of mRNAs transported in hnRNP A2–dependent RNA granules"</p><p></p><p>The Journal of Cell Biology 2008;181(4):579-586.</p><p>Published online 19 May 2008</p><p>PMCID:PMC2386098.</p><p></p
