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Expression patterns of 20 randomly selected NtbHLH genes in tabcco. The relative transcript abundances of 20 randomly selected NtbHLH genes were examined via qPCR and visualized as a histogram. Tobacco flower and 6–7 weeks old seedings grown in the soil were collected for RNA extraction and qPCR analysis. 26S was used as an internal control. Error bars represent SD (n = 3).
