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Schematic diagram of the positions of primers used in real-time RT-PCRs to assess the levels of transcripts at different points between nrfA and nrfE. The PCR sets were designated A, D, E, AA, AB, PA, and PB. The arrows and the numbers 2123, 2124, 2363, 2364, 2404, 2405, 2403, 2442, 2407, 2398, and 2399 indicate primers 2123, 2124, 2363, 2364, 2404, 2405, 2403, 2442, 2407, 2398, and 2399, respectively.
