(a) Real time signal of the ISFET (in ∆ϕ, with background subtraction) during the Bsm DNA polymerase reaction in homogenous solution in low molarity selection buffer initiated (30–40 s) by the addition of DP at different concentrations (final concentration is marked on the picture); (b) Slope (∆ϕ/∆t) dependence on DP concentration calculated from real time signal curves. Reaction conditions: 0.2 mM dNTP, 0.05 pmol/μL FP, 1.6 pmol/μL PR, 0.1 U/μL BSM DNA polymerase; (c) Real time signal of the ISFET (in ∆ϕ, with background subtraction) during the Bsm DNA polymerase reaction in homogenous solution in low molarity selection buffer initiated (30–40 s) by the addition of DP at different concentrations (final concentration is marked on the picture); (d) Slope (∆ϕ/∆t) dependence on DP concentration calculated from real time signal curves. Reaction conditions: 0.2 mM dNTP, 1.0 pmol/μL FP, 1.6 pmol/μL PR, 0.1 U/μL BSM DNA polymerase.