Figure 5From: Differential Gene Expression to Investigate the Effects of Low-level Electrochemical Currents on Bacillus subtilis Effects of ampicillin on biofilms of B. subtilis 1500. Biofilms were treated with varying concentrations of ampicillin and 500 μA total DC (83 μA/cm2) concurrently for 15 min at 37°C.Back to article page