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MALDI-TOF m/z spectra of 2 μM Hfq6 (A), 2 μM Hfq6 and 0.7 μM A18 (B), 8 μM Hfq6 and 4 μM DsrA domain II (C), and 4 μM Hfq6 and 2 μM OxyS-18 (D). All samples were prepared in the 0.2 M Na+ solvent and matrix solution as described in Materials and Methods.
