The succession, or following, of one thing or event after another. [L. sequor, to follow]
- Alu sequences in the human genome a repeated, relatively conserved s. of about 300 bp that often contains a cleavage site for the restriction enzyme AluI near the center; about 1 million copies in the human genome.
- chi s. an octomeric s. of bases in DNA that participates in RecBC-mediated genetic recombination.
- coding s. the portion of DNA that codes for transcription of messenger RNA. See exon.
- insertion s. discrete DNA sequences of nucleotides that are repeated at various sites on bacterial chromosomes, certain plasmids, and bacteriophages and that can move from one site to another on the chromosome, to another plasmid in the same bacterium, or to a bacteriophage.
- intervening s. SYN: intron.
- s. ladder The array of bands, made conspicuous by labeling, when DNA fragmented by endonucleases is subject to gel electrophoresis; corresponds to the nucleotide s..
- leader sequences sequences at the end of either nucleic acid s (DNA and RNA) or proteins that must be processed off to allow for a specific function of the mature molecule.
- long terminal repeat sequences (LTR) regions of the RNA genome associated with regulation, integration, and expression of retroviruses.
- monotonic s. a s. in which each value in a set is greater than the preceding value.
- pulse s. in magnetic resonance imaging, a series of changes in the induced magnetic field, which include the phase and frequency-encoding gradients and read-out functions.
- regulatory s. any DNA s. that is responsible for the regulation of gene expression, such as promoters and operators.
- Shine-Dalgarno s. a purine-rich, untranslated region of mRNA upstream from the initiation codon in prokaryotes; assists in aligning the mRNA on the ribosome.
- termination s. SYN: termination codon.
- twin reversed arterial perfusion s. (TRAP) a circulatory anomaly in monozygotic twins wherein there are placental arterioarterial and venovenous anastomoses and umbilical anomalies, with one fetus being perfused with deoxygenated blood; the recipient fetus develops as an acardiac acephalic, and the pump or donor twin is at risk for cardiac failure.

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se·quence 'sē-kwən(t)s, -.kwen(t)s n
1) a continuous or connected series specif the exact order of bases in a nucleic acid or of amino acids in a protein
2) a consequence, result, or subsequent development (as of a disease)
sequence vt, se·quenced; se·quenc·ing to determine the sequence of chemical constituents (as amino acid residues in a protein or bases in a strand of DNA) in <sequenced the DNA of the entire genome of an organism>

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se·quence (seґkwəns) [L. sequi to follow] 1. a connected series of events or things. 2. in dysmorphology, a pattern of multiple anomalies derived from a single known or presumed prior anomaly or mechanical factor. Called also anomalad and complex. 3. the order of arrangement of residues or constituents in a biological polymer, as the order of nucleotides in DNA or RNA, or of amino acids in a protein. 4. a specific fragment or segment of a biological polymer, with a known arrangement of its residues. 5. to ascertain the order of the residues of a biological polymer.

Medical dictionary. 2011.

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  • séquence — [ sekɑ̃s ] n. f. • 1170; bas lat. sequentia 1 ♦ Liturg. Chant rythmé qui prolonge le verset de l alléluia (à la messe) ou le trait (II, 5o). 2 ♦ (1534) À certains jeux, Série d au moins trois cartes de même couleur qui se suivent (⇒ 1. quarte,… …   Encyclopédie Universelle

  • Sequence — Séquence Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Une séquence est une série d éléments mis et traités les uns à la suite des autres. Le terme peut faire référence à : séquence, une pièce… …   Wikipédia en Français

  • Sequence — Se quence (s[=e] kwens), n. [F. s[ e]quence, L. sequentia, fr. sequens. See {Sequent}.] 1. The state of being sequent; succession; order of following; arrangement. [1913 Webster] How art thou a king But by fair sequence and succession? Shak.… …   The Collaborative International Dictionary of English

  • séquence — 1. (sé kan s ) s. f. 1°   Terme de jeux de cartes. Suite d au moins trois cartes de la même couleur. Séquence de roi de coeur. Séquence de dame de pique. Les tierces, les quatrièmes, les quintes sont des séquences. 2°   Arrangement particulier… …   Dictionnaire de la Langue Française d'Émile Littré

  • sequence — Sequence. s. f. Terme de certains jeux de cartes, Suitte de plusieurs cartes de mesme couleur, & du moins au nombre de trois, dans le rang que le jeu leur donne. Sequence de Roy de coeur. sequence de Dame de picque. avoir flus, sequence …   Dictionnaire de l'Académie française

  • Sequence — Se quence, v. t. (Biochem.) to determine the sequence of; as, to sequence a protein or a DNA fragment. [PJC] …   The Collaborative International Dictionary of English

  • sequence — late 14c., hymn sung after the Hallelujah and before the Gospel, from O.Fr. sequence answering verses (13c.), from M.L. sequentia a following, a succession, from L. sequentem (nom. sequens), prp. of sequi to follow (see SEQUEL (Cf. sequel)). In… …   Etymology dictionary

  • sequence — [sē′kwəns, sē′kwens΄] n. [MFr < LL, a following < L sequens: see SEQUENT] 1. a) the following of one thing after another in chronological, causal, or logical order; succession or continuity b) the order in which this occurs 2. a continuous… …   English World dictionary

  • sequence — англ. [си/куэнс] séquence фр. [сэка/нс] Sequenz нем. [сэквэ/нц] sequenza ит. [сэкуэ/нца] секвенция …   Словарь иностранных музыкальных терминов

  • séquence — sequence англ. [си/куэнс] séquence фр. [сэка/нс] Sequenz нем. [сэквэ/нц] sequenza ит. [сэкуэ/нца] секвенция …   Словарь иностранных музыкальных терминов

  • sequence — ► NOUN 1) a particular order in which related things follow each other. 2) a set of related things that follow each other in a particular order. 3) a part of a film dealing with one particular event or topic. 4) Music a repetition of a phrase or… …   English terms dictionary

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