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Comparison of expression levels for three isofunctional gene sets responsible for methanogenesis in M. thermoautotrophicus strain TM. (A) Strain TM in pure culture. (B) Strain TM in syntrophic coculture. Aliquots (20 μg) of RNA preparations were used for Northern blot analysis. The lane numbers indicate the sampling points, which correspond to the numbers in Fig. 2 and 3.
