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Expression of nanE and siaP is altered by helical phasing. Expression of nanE and siaP in 2019ΔcyaA (A), 2019ΔcyaA ΔnagB (B), 2019ΔcyaA+5 bp (C), and 2019ΔcyaA ΔnagB+5 bp (D). Cultures grown with sialic acid (open bars), cAMP (gray bars), and both sialic acid and cAMP (black bars) were compared to a reference culture that received neither.
