1DSD NMR STUDY OF DNA (5'-D(*GP*AP*TP*GP*CP*TP*TP*C)-3') T:T MISMATCHED DUPLEX COMPLEXED WITH ACTINOMYCIN D, MINIMIZED AVERAGE STRUCTURE ANTIBIOTIC/DNA, COMPLEX (DEOXYRIBONUCLEIC ACID/DRUG), DNA, T:T MISMATCH, ANTIBIOTIC/DNA COMPLEX