Fig. 4. pH changes of solutions containing SNAP coated substrates at room temperature (RT) and at 37 °C (A) PBS RT (B) PBS 37 °C (C) DMEM RT (D) DMEM 37 °C (E) LB broth RT (F) LB broth 37 °C. Black 2 w/v%; blue 4 w/v%/OC; red 4 w/v%. The pH change observed upon release of HNO2 is dependent on the amount of immobilised SNAP and the buffering capacity of the solution. Values represent mean ± SD (n = 3).
