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This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
The differential pulse voltammograms of guanine oxidation on (•) an activated PGE, (▾) TS-1T (1 μM) immobilized on an activated PGE and (○) TS-1P (1 μM) immobilized on an activated PGE. Voltammetric conditions: Scanning potential steps, 20 mV/s. Potential amplitude, 50 mV.