TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
BETA CHAIN [9 records]
Record 1 - internal organization data 2013-08-30
Record 1, English
Record 1, Subject field(s)
- Chemistry
Record 1, Main entry term, English
- alpha-
1, record 1, English, alpha%2D
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- a 1, record 1, English, a
correct, see observation
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A prefix denoting the position of a substituting atom or group in an organic compound. The Greek letters alpha, beta, gamma, etc., are usually not identical with the IUPAC numbering system, 1, 2, 3, etc., since they do not start from the same carbon atom. However, alpha and beta are used with naphthalene ring compounds to show the 1 and 2 positions respectively. Alpha, beta, etc. are also used to designate attachment to the side chain of a ring compound. 1, record 1, English, - alpha%2D
Record number: 1, Textual support number: 1 OBS
"a" refers to the Greek letter alpha. 2, record 1, English, - alpha%2D
Record 1, French
Record 1, Domaine(s)
- Chimie
Record 1, Main entry term, French
- alpha-
1, record 1, French, alpha%2D
correct, see observation
Record 1, Abbreviations, French
Record 1, Synonyms, French
- a 1, record 1, French, a
correct, see observation
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
1. Préfixe servant à désigner l'un de deux ou de plusieurs isomères. (Par ex., dans la série du naphtalène : a-naphtol). 1, record 1, French, - alpha%2D
Record number: 1, Textual support number: 2 DEF
2. Préfixe utilisé dans la nomenclature stéréochimique des sucres et des stérols. 1, record 1, French, - alpha%2D
Record number: 1, Textual support number: 3 DEF
3. Préfixe indiquant que deux fonctions ne sont séparées par aucun atome de carbone. 1, record 1, French, - alpha%2D
Record number: 1, Textual support number: 1 OBS
La lettre «a» représente la lettre grecque alpha; «alpha» et «a» s'écrivent en italiques. 2, record 1, French, - alpha%2D
Record number: 1, Textual support number: 2 OBS
[...] les préfixes de position [...] sont imprimés en lettres italiques [...] [et ils] n'interviennent pas dans une classification par ordre alphabétique. [Fascicule de documentation AFNOR intitulé : chimie organique. Mode d'écriture des noms systématiques - numéro T01-101, sept. 1969]. 3, record 1, French, - alpha%2D
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2012-10-25
Record 2, English
Record 2, Subject field(s)
- Biochemistry
Record 2, Main entry term, English
- C-peptide
1, record 2, English, C%2Dpeptide
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- connecting peptide 1, record 2, English, connecting%20peptide
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
A metabolically inactive polypeptide chain connecting proinsulin and insulin, produced by the pancreatic B [beta] cells in equimolar amounts with insulin as a result of proinsulin cleavage. 1, record 2, English, - C%2Dpeptide
Record 2, French
Record 2, Domaine(s)
- Biochimie
Record 2, Main entry term, French
- peptide C
1, record 2, French, peptide%20C
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
[...] la proinsuline est transformée en insuline active par l'action de peptidases spécifiques, qui clivent deux liaisons peptidiques dans la chaîne de la proinsuline en retirant un segment médian. Deux aminoacides sont alors retirés à chaque extrémité du segment médian par action d'une peptidase pour donner le peptide C. 2, record 2, French, - peptide%20C
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Bioquímica
Record 2, Main entry term, Spanish
- péptido C
1, record 2, Spanish, p%C3%A9ptido%20C
correct, masculine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
- péptido conector 1, record 2, Spanish, p%C3%A9ptido%20conector
correct, masculine noun
Record 2, Textual support, Spanish
Record number: 2, Textual support number: 1 DEF
Cadena de aminoácidos que conecta las cadenas A y B de la proinsulina y es metabólicamente inactivo. 1, record 2, Spanish, - p%C3%A9ptido%20C
Record 3 - external organization data 2011-04-06
Record 3, English
Record 3, Subject field(s)
- Chemistry
- Geochemistry
- Nuclear Physics
- Compartment - Canadian Nuclear Safety Commission
Record 3, Main entry term, English
- strontium-90
1, record 3, English, strontium%2D90
correct
Record 3, Abbreviations, English
- 90Sr 2, record 3, English, 90Sr
correct, see observation
Record 3, Synonyms, English
- strontium 90 3, record 3, English, strontium%2090
less frequent
- radiostrontium 4, record 3, English, radiostrontium
correct, see observation
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
Radioactive strontium of mass number 90; half-life, 28 years; radiation, beta; and radiotoxicity, very hazardous. In fallout, this isotope, a member of the mass 90 fission product chain which is produced in high yield from fission, is the longest lived member of that chain and consequently is itself produced in high yield. 5, record 3, English, - strontium%2D90
Record number: 3, Textual support number: 1 OBS
Symbol: 90Sr. The number 90 is a superscript. 6, record 3, English, - strontium%2D90
Record number: 3, Textual support number: 2 OBS
The isotope 90 is not the only radioactive isotope of strontium. Consequently, the term "radiostrontium" is correct but it has a more generic sense. 7, record 3, English, - strontium%2D90
Record 3, Key term(s)
- radioactive strontium
Record 3, French
Record 3, Domaine(s)
- Chimie
- Géochimie
- Physique nucléaire
- Tiroir - Commission canadienne de sûreté nucléaire
Record 3, Main entry term, French
- strontium 90
1, record 3, French, strontium%2090
correct, masculine noun
Record 3, Abbreviations, French
- Sr 90 2, record 3, French, Sr%2090
correct
- 90Sr 3, record 3, French, 90Sr
correct, see observation
Record 3, Synonyms, French
- strontium-90 4, record 3, French, strontium%2D90
masculine noun, less frequent
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Radioélément de période d'une durée de 28,5 ans. 5, record 3, French, - strontium%2090
Record number: 3, Textual support number: 1 CONT
Le strontium est un ostéotrope; plus de 99 % du strontium retenu dans l'organisme se trouve dans le squelette. Sa période biologique dans l'os est de l'ordre de 5 000 à 6 000 jours. Les isotopes radioactifs du strontium, strontium 89 (TR 50,5 jours) et strontium 90 (TR 28 ans), avec son descendant à vie courte l'yttrium 90, tous émetteurs ß, entraîneront donc essentiellement une irradiation des cellules qui tapissent la surface des os ainsi qu'une irradiation de la moelle osseuse rouge. 6, record 3, French, - strontium%2090
Record number: 3, Textual support number: 1 OBS
Symbole : 90Sr. Le chiffre 90 est en exposant. 7, record 3, French, - strontium%2090
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Química
- Geoquímica
- Física nuclear
- Compartimiento - Comisión Canadiense de Seguridad Nuclear
Record 3, Main entry term, Spanish
- estroncio 90
1, record 3, Spanish, estroncio%2090
correct, masculine noun
Record 3, Abbreviations, Spanish
- 90Sr 2, record 3, Spanish, 90Sr
correct, see observation
Record 3, Synonyms, Spanish
- estroncio-90 3, record 3, Spanish, estroncio%2D90
masculine noun
Record 3, Textual support, Spanish
Record number: 3, Textual support number: 1 OBS
Isótopo del estroncio radiactivo. Período de semidesintegración, 28 años. Radiación beta. Veneno radiactivo muy tóxico que aparece en la lluvia radiactiva originada por las explosiones nucleares. 4, record 3, Spanish, - estroncio%2090
Record number: 3, Textual support number: 2 OBS
Record 4 - internal organization data 2011-01-11
Record 4, English
Record 4, Subject field(s)
- Biological Sciences
Record 4, Main entry term, English
- beta-bend
1, record 4, English, beta%2Dbend
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- beta bend 2, record 4, English, beta%20bend
correct
- beta-turn 2, record 4, English, beta%2Dturn
correct
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
Folding a polypeptide chain to a compact globular form will necessitate some way to change the direction of the polypeptide chain, as might, for example, be required to connect adjacent ends of the polypeptide chains in an antiparallel [beta]-sheet. A commonly observed and particularly efficient way to do this is by formation of a tight loop in which a residue's carbonyl group forms a hydrogen bond with the amide NH group of the residue three positions further along the polypeptide chain. The resulting so-called [beta]-bend reverses the direction of the polypeptide chain. 1, record 4, English, - beta%2Dbend
Record 4, French
Record 4, Domaine(s)
- Sciences biologiques
Record 4, Main entry term, French
- virage bêta
1, record 4, French, virage%20b%C3%AAta
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- coude bêta 2, record 4, French, coude%20b%C3%AAta
correct, masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Les retournements de la chaîne polypeptidique s'effectuent selon des structures déterminées appelées virages [bêta]. [...] Un virage [bêta] comporte un segment de la chaîne polypeptidique de quatre acides aminés consécutifs [...], se retournant de 180°, et tels que la distance entre [le premier et le quatrième] soit inférieure à 7 A et que ce segment ne forme pas d'hélice. Il existe différents types de virages [bêta] selon la valeur des angles dihédraux. 2, record 4, French, - virage%20b%C3%AAta
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2006-05-05
Record 5, English
Record 5, Subject field(s)
- Genetics
- Immunology
Record 5, Main entry term, English
- D gene
1, record 5, English, D%20gene
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
Sets of gene segments lying between the V and J genes in the immunoglobulin heavy chain genes, and in the T cell receptor beta and delta chain genes which are recombined with V and J genes during ontogeny. 1, record 5, English, - D%20gene
Record number: 5, Textual support number: 1 OBS
usually used in plural 2, record 5, English, - D%20gene
Record 5, Key term(s)
- D genes
Record 5, French
Record 5, Domaine(s)
- Génétique
- Immunologie
Record 5, Main entry term, French
- gène D
1, record 5, French, g%C3%A8ne%20D
correct, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Groupe de segments génétiques situés entre les gènes V et J des chaînes lourdes d'immunoglobulines et des chaînes bêta et delta du récepteur T qui sont recombinés avec les gènes V et J au cours de l'ontogénie. 2, record 5, French, - g%C3%A8ne%20D
Record number: 5, Textual support number: 1 OBS
habituellement utilisé au pluriel 3, record 5, French, - g%C3%A8ne%20D
Record 5, Key term(s)
- gènes D
Record 5, Spanish
Record 5, Campo(s) temático(s)
- Genética
- Inmunología
Record 5, Main entry term, Spanish
- gen D
1, record 5, Spanish, gen%20D
correct, masculine noun
Record 5, Abbreviations, Spanish
Record 5, Synonyms, Spanish
- segmento génico D 1, record 5, Spanish, segmento%20g%C3%A9nico%20D
correct, masculine noun
Record 5, Textual support, Spanish
Record 6 - internal organization data 2003-05-14
Record 6, English
Record 6, Subject field(s)
- Immunology
- Biotechnology
Record 6, Main entry term, English
- monoclonal immunoglobulin 1, record 6, English, monoclonal%20immunoglobulin
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
M component : an increased concentration of a structurally homogenous protein in serum or urine appearing as a sharp spike in the beta or gamma globulin region on protein electrophoresis. The protein is in most cases a monoclonal immunoglobulin heavy chain or heavy chain fragment, or a monoclonal immunoglobulin light chain or light chain fragment, either alone or with monoclonal immunoglobulin containing the same light chain. 2, record 6, English, - monoclonal%20immunoglobulin
Record 6, French
Record 6, Domaine(s)
- Immunologie
- Biotechnologie
Record 6, Main entry term, French
- immunoglobuline monoclonale
1, record 6, French, immunoglobuline%20monoclonale
feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 DEF
Immunoglobuline migrant à un pic étroit et homogène à l'électrophorèse des protéines, et qui est caractéristique de certaines proliférations malignes lymphocytaires (macroglobulinémie de Waldenstrom) ou plasmocytaires (myélomes), bien qu'elles puissent également exister à l'état isolé sans prolifération sous-jacente décelable. Ce pic est constitué de molécules toutes identiques (même chaîne lourde ou légère) qui proviennent, pense-t-on, de la prolifération d'un seul clone plasmocytaire. 2, record 6, French, - immunoglobuline%20monoclonale
Record 6, Spanish
Record 6, Campo(s) temático(s)
- Inmunología
- Biotecnología
Record 6, Main entry term, Spanish
- inmunoglobulina monoclonal
1, record 6, Spanish, inmunoglobulina%20monoclonal
correct, feminine noun
Record 6, Abbreviations, Spanish
Record 6, Synonyms, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 1993-03-02
Record 7, English
Record 7, Subject field(s)
- Immunology
Record 7, Main entry term, English
- class I antigen
1, record 7, English, class%20I%20antigen
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
- class I MHC molecule 2, record 7, English, class%20I%20MHC%20molecule
Record 7, Textual support, English
Record number: 7, Textual support number: 1 DEF
(Each of) major histocompatibility antigens found on virtually every cell, human erythrocytes being the only notable exception; they are found on molecules consisting of two noncovalently bound chains. One on 44,000-dalton polymorphic glycoprotein partially embedded in the cell membrane, is determined by an MHC gene(HLA-A, -B, or -C in humans); the other, [beta]2-microglobulin, a 12,000-dalton nonopolymorphic protein, is determined by a non-MHC gene. Class I antigens are the classic histocompatibility antigens recognized during graft rejection.... 3, record 7, English, - class%20I%20antigen
Record number: 7, Textual support number: 2 DEF
Histocompatibility antigen composed of two non-covalently associated, glycosylated polypeptides : a heavy chain of M. Wt. 44 000 and beta squared-microglobulin, M. Wt. 12 000. 4, record 7, English, - class%20I%20antigen
Record 7, French
Record 7, Domaine(s)
- Immunologie
Record 7, Main entry term, French
- antigène de classe I
1, record 7, French, antig%C3%A8ne%20de%20classe%20I
correct, masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
- CMH de classe I 2, record 7, French, CMH%20de%20classe%20I
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Différentes approches ont permis de définir deux catégories d'antigènes d'histocompatibilité : les antigènes de classe I qui stimulent puis qui sont la cible de la réaction de lymphocytotoxicité due aux cellules T et les antigènes de classe II (...). (...) Les antigènes de classe I ont une distribution tissulaire ubiquitaire sur les cellules diploïdes (...). Les antigènes de classe I sont composés d'une chaîne lourde polymorphe (45 kDa) codée dans le CMH, associée à la [bêta]2-microglobuline non polymorphe qui est codée en dehors du CMH. 3, record 7, French, - antig%C3%A8ne%20de%20classe%20I
Record number: 7, Textual support number: 2 CONT
(...) la plupart des cellules cytotoxiques reconnaissent les antigènes viraux en association avec les antigènes de classe I ce qui conforte cette hypothèse, puisque ces antigènes sont présents sur la majorité des cellules. 4, record 7, French, - antig%C3%A8ne%20de%20classe%20I
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 1993-03-02
Record 8, English
Record 8, Subject field(s)
- Immunology
Record 8, Main entry term, English
- class II antigen
1, record 8, English, class%20II%20antigen
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
- class II MHC molecule 2, record 8, English, class%20II%20MHC%20molecule
Record 8, Textual support, English
Record number: 8, Textual support number: 1 DEF
Histocompatibility antigens composed of two non-covalently associated glycosylated polypeptides : alpha chain, M. Wt. 32 000 and beta chain, M. Wt. 28 000. 3, record 8, English, - class%20II%20antigen
Record 8, French
Record 8, Domaine(s)
- Immunologie
Record 8, Main entry term, French
- antigène de classe II
1, record 8, French, antig%C3%A8ne%20de%20classe%20II
correct, masculine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
- antigène de la classe II 2, record 8, French, antig%C3%A8ne%20de%20la%20classe%20II
correct, masculine noun
- molécule HLA de classe II 3, record 8, French, mol%C3%A9cule%20HLA%20de%20classe%20II
feminine noun
- CMH de classe II 4, record 8, French, CMH%20de%20classe%20II
Record 8, Textual support, French
Record number: 8, Textual support number: 1 CONT
L'augmentation de l'expression d'antigènes de classe II peut être un simple marqueur de rejet ou peut jouer un rôle dans la réaction de rejet. (base de données Pascal) 2, record 8, French, - antig%C3%A8ne%20de%20classe%20II
Record number: 8, Textual support number: 2 CONT
On a observé à la fois une expression coordonnée et une expression non coordonnée des antigènes de la classe II du complexe d'histocompatibilité majeur sans corrélation avec le phénotype immunologique, le degré morphologique ou l'indice de prolifération. (base de données Pascal) 2, record 8, French, - antig%C3%A8ne%20de%20classe%20II
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 1980-09-01
Record 9, English
Record 9, Subject field(s)
- Microbiology and Parasitology
Record 9, Main entry term, English
- beta chain 1, record 9, English, beta%20chain
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 OBS
The alpha and beta chains have essentially the same structure, are about the same length and show roughly the same rate of evolutionary amino acid substitution. They arose through gene duplication some 450 million years ago and became differentiated as they accumulated mutations independently. 1, record 9, English, - beta%20chain
Record 9, French
Record 9, Domaine(s)
- Microbiologie et parasitologie
Record 9, Main entry term, French
- chaîne bêta 1, record 9, French, cha%C3%AEne%20b%C3%AAta
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 OBS
Les chaînes alpha et bêta ont approximativement la même structure, sont de longueur à peu près identique et présentent des taux de substitution d'acide aminé voisins. Elles se sont formées, il y a quelque 450 millions d'années, par duplication génique, puis se sont différenciées indépendamment par accumulation de mutations. 1, record 9, French, - cha%C3%AEne%20b%C3%AAta
Record 9, Spanish
Record 9, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.
- Date Modified: