Deoxyribonucleic acid double-stranded helix

DNA DNA (deoxyribonucleic acid) is a double-stranded helix of nucleotides... 

Crick (1954) proposed a two-stranded helix, somewhat reminiscent of the Watson-Crick double-strand helix which had been so successful for deoxyribonucleic acid. The model consisted of two polypeptide chains wound helically around a common axis and held together by interchain peptide hydrogen bonds. The peptide bonds were all in the cfs-configuration, and the repeating unit consisted of a pair of amino acid residues, one perpendicular and the other parallel to the fiber axis. As a result, planes... 

DNA (2-deoxyribonucleic acid) essential genetic material that is found in the nucleus of every cell a double helix with two polymeric strands, each strand composed of repeating units called nucleotides (2.3)... 

DNA Deoxyribonucleic acid is the repository of hereditary characteristics. The most commonly described form of DNA is the double-stranded form, arranged as a helix. Chromosomes are composed of double-stranded DNA. So called DNA fingerprinting offers a basis for evaluating the probability that blood, hair, semen or tissue samples originate from a given person, and thus offers a forensic tool as well as a means to determine lineages of humans and animals... 

DNA (deoxyribonucleic acid) The basic genetic material found in all living cells (and some viruses), providing the blueprint (i.e. genes) for construction of proteins. DNA is composed of sugars, phosphates, and bases arranged in a double helix, a double stranded, chain-like molecules composed of nucleotide base pairs. 

Deoxyribonucleic acid (DNA) carries the genetic information of all cellular forms of life. DNA is usually found as a double helix, in which the nucleoside bases of the single strands are stacked upon each other, forming strong hydrogen bonds with... 

During the past half a century, fundamental scientific discoveries have been aided by the symmetry concept. They have played a role in the continuing quest for establishing the system of fundamental particles [7], It is an area where symmetry breaking has played as important a role as symmetry. The most important biological discovery since Darwin s theory of evolution was the double helical structure of the matter of heredity, DNA, by Francis Crick and James D. Watson (Figure 1-2) [8], In addition to the translational symmetry of helices (see, Chapter 8), the molecular structure of deoxyribonucleic acid as a whole has C2 rotational symmetry in accordance with the complementary nature of its two antiparallel strands [9], The discovery of the double helix was as much a chemical discovery as it was important for biology, and lately, for the biomedical sciences. 

---