quaternary structure
11quaternary — 1. Denoting a chemical compound containing four elements; e.g., NaHSO4. Cf.:q. structure. 2. Fourth in a series. 3. Relating to organic compounds in which some central atom is attached to four functional groups; applied to the usually trivalent… …
12structure — 1. The arrangement of the details of a part; the manner of formation of a part. 2. A tissue or formation made up of different but related parts. 3. In chemistry, the specific connections of the atoms in a given molecule. SYN: structura. [L.… …
13Protein structure — Proteins are an important class of biological macromolecules present in all biological organisms, made up of such elements as carbon, hydrogen, nitrogen, phosphorus, oxygen, and sulfur. All proteins are polymers of amino acids. The polymers, also …
14Secondary structure — In biochemistry and structural biology, secondary structure is the general three dimensional form of local segments of biopolymers such as proteins and nucleic acids (DNA/RNA). It does not, however, describe specific atomic positions in three… …
15Primary structure — In biochemistry, the primary structure of a biological molecule is the exact specification of its atomic composition and the chemical bonds connecting those atoms (including stereochemistry). For a typical unbranched, un crosslinked biopolymer… …
16Tertiary structure — In biochemistry and chemistry, the tertiary structure of a protein or any other macromolecule is its three dimensional structure, as defined by the atomic coordinates. [GoldBookRef|title=tertiary structure|file=T06282] Relationship to primary… …
17Nucleic acid structure — refers to the structure of nucleic acids such as DNA and RNA It is often divided into four different levels: Primary structure the raw sequence of nucleobases of each of the component DNA strands; Secondary structure the set of interactions… …
18tertiary structure — The third level of structural organization in a macromolecule. The primary structure of a protein (for example) is the amino acid sequence, the secondary structure is the folding of the peptide chain (alpha helical or beta pleated), the tertiary… …
19primary structure — The linear sequence of residues making up a polymer such as a nucleic acid, polysaccharide or protein. See: secondary structure, tertiary structure and quaternary structure …
20secondary structure — Localized three dimensional conformations adopted by macromolecules, in particular nucleic acids and polypeptides. These arise as a result of the action of non covalent forces generated by interactions between residues which are brought into… …
