AM1 Study of N-2-Acetylaminofluorene bonded to Deoxyguanosine at the Minor Adduct Site

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Abstract

We have computed the total energy as a function of six important torsion angles of the carcinogen N-2-acetylaminofluorene (AAF) bonded to the nitrogen N2 of deoxyguanosine using the semiempirical quantum mechanical method AM1. One global minimum and one local minimum are found separated by a modest barrier. We have computed the normal-mode frequencies of the relevant torsional motions and have determined the rate of conversion between the two minima.

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