DNA, CONFORMATIONAL SWITCH, CYTOSINE METHYLATION, P53 MUTATION HOT SPOT, DNA ADDUCT, BENZO[A]PYRENE, BPDE 1Y9H METHYLATION OF CYTOSINE AT C5 IN A CPG SEQUENCE CONTEXT CAUSES A CONFORMATIONAL SWITCH OF A BENZO[A]PYRENE DIOL EPOXIDE-N2-GUANINE ADDUCT IN DNA FROM A MINOR GROOVE ALIGNMENT TO INTERCALATION WITH BASE DISPLACEMENT