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Effect of the blocking step time: (a) 30 min, (b) 60 min on the DNA hybridization sensor response. [Probe] = 100 nM, 2 min + 0.5 V; [S-AP] = 0.4 nM; hybridization time, 30 min; S-AP incubation time, 90 min; RT. Current response are given as average ± S.D. (n = 3).
