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- [2] A TWO-DIMENSIONAL H-1-NMR STUDY OF THE DAM METHYLASE SITE - COMPARISON BETWEEN THE HEMIMETHYLATED GATC SEQUENCE, ITS UNMETHYLATED ANALOG AND A HEMIMETHYLATED CATG SEQUENCE - THE SEQUENCE DEPENDENCE OF METHYLATION UPON BASE-PAIR LIFETIMES EUROPEAN JOURNAL OF BIOCHEMISTRY, 1987, 167 (03): : 397 - 404