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Fl(2)d forms protein–protein complexes with the early acting general splicing regulators U1-70K, U2AF50, and U2AF38. Immunoprecipitations of wild-type nuclear embryonic extract probed for U1-70K (top), U2AF50 (middle), and U2AF38 (bottom). Lane 1, extract; lane 2, Fl(2)d immunoprecipitation; lane 3, Scute immunoprecipitation.
