A double helix B-type geometry based on high-resohition proton NMR of single-helical DNA fragments: d(TA)5d(TA)5

Abstract
A single-helical B-type geometry is presented based on 1H NMR observations on d(TATA) and several other small single-helical DNA fragments. The structure is extended to one complete turn of double-helical DNA and its characteristics are compared with other known B-type structures.