For axenic bacteria the DIC uptake parameter and bacterial growth efficiency depend on the initial exponential growth rate.

(A) The relationship between the DIC uptake parameter X and the initial exponential growth rate μ_B = μ_b c_o(0)/(c_o(0)+K_c) was approximated with a logarithmic fit using equation X = m ln(μ_B)+n, giving m = 0.0167±0.0004 and n = 0.0785±0.0013, with R² = 0.999. (B) The relationship between the bacterial growth efficiency η and μ_B was approximated with a logarithmic fit using equation η = p ln(μ_B)+q, giving p = −0.10±0.12 and q = 0.12±0.36, with R² = 0.282.

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