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HPLC traces for the separation of: (a) the mixture of dG, dT and dA; (b) R-N2-CEdG; (c) S-N2-CEdG; (d) the enzymatic digestion mixture of ODN2; and (e) the enzymatic digestion mixture of ODN1. A UV detector was set at 260 nm for monitoring the effluents. The presence of residual adenosine deaminase in the commercial enzymes caused the deamination of some dA to dI.
