The structure has two-fold symmetry, with pairwise stacking of the double-helical arms, which form two continuous B-DNA helices that ... two phosphate groups from one helix occupy the major ...

The left-handed Z-DNA double helix is held together by traditional Watson-Crick base pairs, but unlike righthanded B-DNA, which has major and minor grooves between the twists of its sugar-phosphate ...

Watson and Crick's discovery of DNA structure in 1953 revealed a possible ... the entire original DNA double helix serves as a template for a new double helix, such that each round of cell ...