Visualization of positive control (hnRNP-C) protein-RNA complexes. As indicated, samples were UV irradiated and/or immunoprecipitated using anti-hnRNP-C antibody. Following infrared adaptor labeling, SDS-PAGE, and membrane transfer, protein-RNA complexes were visualized in the far red and colorimetric channels. Channels were overlaid to create a cutting mask. Dashed boxes indicate the regions excised. Arrowheads indicate hnRNP-C monomer and dimer, which are supershifted due to bound RNA.