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ChIP-qPCR of cexA promoter region. Control and ΔlaeA strains were cultured as described in the text. Histone H3 (A), histone H3K4me3 (B), and histone H3K9me3 (C) occupancies of the cexA promoter region were investigated. The means and SDs were determined from the results of 3 independent cultivations. Asterisks indicate significant difference (*, P < 0.05; Student’s t test) from the results for the control strain.
