quaternary structure

quaternary structure
the geometric arrangement of the subunits of a macromolecule.

Medical dictionary. 2011.

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  • Quaternary structure — In biochemistry, quaternary structure is the arrangement of multiple folded protein molecules in a multi subunit complex.Description and examplesMany proteins are actually assemblies of more than one polypeptide chain, which in the context of the …   Wikipedia

  • quaternary structure — Fourth order level of structural organization of proteins. Tertiary structure defines the shape of single protein moleuclues; quaternary structure the way in which dimers or multimers are arranged …   Dictionary of molecular biology

  • quaternary structure of protein — quaternary structure of protein. См. четвертичная структура белка. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • quaternary structure — A level of protein structure where several individual molecules assemble together and form a functional cluster. A classic example is haemoglobin, a complex of four myoglobin like units. See: tertiary structure …   Glossary of Biotechnology

  • Protein quaternary structure — In biochemistry, quaternary structure is the arrangement of multiple folded protein or coiling protein molecules in a multi subunit complex. Contents 1 Description and examples 2 Nomenclature of quaternary structures 3 Determination of qua …   Wikipedia

  • Nucleic acid quaternary structure — The quaternary structure of a nucleic acid refers to the interactions between separate nucleic acid molecules, or between nucleic acid molecules and proteins. The concept is analogous to protein quaternary structure, but as the analogy is not… …   Wikipedia

  • Quaternary (disambiguation) — Quaternary (from Latin quaternarius ) is an adjective meaning consisting of or containing four each , but sometimes (as in geology) taken to mean fourth or fourth hand , where it is used in place of quartary to continue the sequence Primary,… …   Wikipedia

  • Quaternary ammonium muscle relaxants — are quaternary ammonium salts used as drugs for muscle relaxation, most commonly in anasthesia. It is necessary to prevent spontaneous movement of muscle during surgical operations. Muscle relaxants inhibit neuron transmission to muscle by… …   Wikipedia

  • Quaternary ammonium cation — Quaternary ammonium cations, also known as quats, are positively charged polyatomic ions of the structure NR4+ with R being alkyl groups. Unlike the ammonium ion NH4+ itself and primary, secondary, or tertiary ammonium cations, the quaternary… …   Wikipedia

  • quaternary — 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… …   Medical dictionary

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