1MKL DNA, STRUCTURE OF THE 8,9-DIHYDRO-8-(N7-GUANYL)-9-HYDROXY- AFLATOXIN B1 ADDUCT IN A 5'-CPAFBG-3' SEQUENCE CONTEXT NMR REFINED STRUCTURE OF THE 8,9-DIHYDRO-8-(N7-GUANYL)-9- HYDROXY-AFLATOXIN B1 ADDUCT IN A 5'-CPAFBG-3' SEQUENCE