Les bases azotées sont des molécules aromatiques dont le noyau est soit une purine (bases puriques), soit une pyrimidine (bases pyrimidiques). Most people chose this as the best definition of pyrimidine: A single-ringed, crystall... See the dictionary meaning, pronunciation, and sentence examples. home / medterms medical dictionary a-z list / pyrimidine definition Medical Definition of Pyrimidine. Le chimiste allemand Hermann ⦠base pyrimidique locution Partager sur Facebook; Twitter Email; Définition Synonyme base pyrimidique, locution . Get detailed, expert explanations on basicity of pyrimidine that can improve your comprehension and help with homework. Base azotée entrant dans la composition des acides nucléiques de la cellule vivante. Purines. Sens 1 . Pyrimidines . Le plus simple de ces 2 noyaux, la pyrimidine est une base azotée comportant 2 atomes d'azote et 4 atomes de carbone, le tout formant un cycle hétérogène ou hétérocycle de 6 atomes (Privat de Garilhe, Acides nucl., 1963, p. 14). Adenine (A) Purine. programmes-cadres - acersocome - jonsonien - ultraroyaliste - ferroferrite - ⦠Dans une base purique, la pyrimidine est ⦠Information and translations of pyrimidine in the most comprehensive dictionary definitions resource on the web. Class of nucleotides with one ring. Biologie. Base + sugar + phosphate. Nucléotide Pyrimidique: Pyrimidines ⦠Definition of a nucleotide. Base + sugar. La thymine est lâune des bases pyrimidiques qui entrent dans la composition des acides nucléiques. All Free. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Reviewed on 12/27/2018. Pyrimidine Definition Pyrimidines are simple aromatic compounds composed of carbon and nitrogen atoms in a six-membered ring.. pyrimidines A class of nitrogenous compounds containing one heterocyclic ring. home > pyrimidine Pyrimidine: One of the two classes of bases in DNA and RNA. Atoms or groups attached to this ring distinguish pyrimidines, which include cytosine, thymine, uracil, thiamine (vitamin B1), uric ⦠The pyrimidine bases are thymine (T) and cytosine (C) in DNA and cytosine (C) and uracil (U) in RNA. On ne connaît actuellement qu'une voie de biosynthèse commune ; cette voie part de l'aspartate qui est transformé par trois réactions consécutives en orotate (elle-même une pyrimidine), qui devient ⦠Pyrimidine dimers are molecular lesions formed from thymine or cytosine bases in DNA via photochemical reactions. Synthèse des pyrimidines. A pyrimidine is an organic ring consisting of six atoms: 4 carbon atoms and 2 nitrogen atoms. What does pyrimidine bases mean in law? Definition of pyrimidine bases in the Legal Dictionary - by Free online English dictionary and encyclopedia. Pronunciation of pyrimidine and its etymology. Related words - pyrimidine synonyms, antonyms, hypernyms and hyponyms. Recherche d'information médicale. The merging of the support level and resistance level. Différence clé: La pyrimidine est un composé organique aromatique hétérocyclique composé dâazote et de carbone. Pyrimidines are stabilized by resonance among atoms in the ring, which gives most of the bonds a partial double bond character. Elles constituent la base de plusieurs coenzymes ou cofacteurs comme la coenzyme A, le NAD+, ou encore le NADP+. Les bases de pryimidine sont composées d'une structure à un seul ⦠⦠Purines and Pyrimidines are nitrogenous bases that make up the two different kinds of nucleotide bases in DNA and RNA.The two-carbon nitrogen ring bases (adenine and guanine) are purines, while the one-carbon nitrogen ring bases (thymine and cytosine) are pyrimidines. Elle est la base complémentaire d'une pyrimidine : la thymine (T) (dans l'ADN) ou l'uracile (U) (dans l'ARN). pyrimidine A nitrogenous base compound. Les bases pyrimidiques sont au nombre de 3 : la cytosine, lâuracile et la thymine. pyrimidine base definition in English dictionary, pyrimidine base meaning, synonyms, see also 'pyridine',primine',pyridoxamine'. Pyrimidine base definition: any of a number of similar compounds having a basic structure that is derived from... | Meaning, pronunciation, translations and examples La purine est également un composé organique aromatique hétérocyclique composé d'un cycle pyrimidine condensé à un cycle imidazole. Ces molécules interviennent dans plusieurs réactions chimiques de l'organisme. A third pyrimidine, uracil, takes the place of thymine in RNA. Base In technical analysis, a situation in which the support level and the resistance level are roughly ⦠For example, pyrimidine rings are found in thiamine (vitamin B1) and barbituates as well as in nucleotides. List of pyrimidines. reincorporated into nucleotides. Guanine (G) Purine. La cytosine est constituée dâun noyau pyrimidine dont le carbone 4 est substitué par une fonction amine et le carbone 2 par une fonction cétone. See more. De novo ⦠Meaning of pyrimidine with illustrations and photos. Employé comme nom. [1] [2] Ultraviolet light induces the formation of covalent linkages by reactions localized on the C=C double bonds. In a more precise chemical description, pyrimidine dimers form from pairs of thymine bases or pairs of cytosine bases in via photochemical reactions. Pyrimidines are also found in some meteorites, although their origin ⦠Définitions. (Figure 4-2) Full glossary ... pyrimidine ⦠Enrich your vocabulary with the English Definition dictionary La base pyrimidique est une molécule azotée hétérocyclique aromatique, présente dans l'ADN et l'ARN. Definition of pyrimidine in the Definitions.net dictionary. La guanine (G), une des bases des acides nucléiques, est une purine. Two pyrimidines, cytosine and thymine, commonly are found in DNA; in RNA, uracil replaces thymine. There are many other nitrogenous bases found in nature, plus the molecules may be found incorporated into other compounds. A chart pattern depicting the period when the supply and demand of a certain stock are in relative equilibrium, resulting in a narrow trading range. Meaning of pyrimidine bases as a legal term. Pyrimidines. Ultraviolet light (UV) induces the formation of covalent linkages between consecutive bases along the nucleotide chain in the vicinity of their carbonâcarbon double bonds. Base A technical analysis tool. What does pyrimidine mean? Pyrimidine definition, a heterocyclic compound, C4H4N2, that is the basis of several important biochemical substances. The dimerization reaction can also occur among pyrimidine bases ⦠Thymine (T) Pyrimidine. Elle entre notamment ⦠pyrimidine - WordReference English dictionary, questions, discussion and forums. pyrimidines. pyrimidine est employé comme nom féminin singulier. Pyrimidine definition is - a feeble organic base C4H4N2 of penetrating odor. It is a... | Meaning, pronunciation, translations and examples Pyrimidines are one of two biologically important families of nitrogen-containing molecules called nitrogenous bases. traduction pyrimidine base dans le dictionnaire Anglais - Francais de Reverso, voir aussi 'primitive',pyramid',pyramid selling',prim', ⦠Pyrimidine definition: a liquid or crystalline organic compound with a penetrating odour ; 1,3-diazine. Quelques mots au hasard. Définition pyrimidine base dans le dictionnaire anglais de définitions de Reverso, synonymes, voir aussi 'pyridine',primine',pyridoxamine', expressions, ⦠Elle est la base complémentaire d'une pyrimidine : la cytosine (C) (dans l'ADN et l'ARN). Dictionnaire français. Definition of pyrimidine in the Fine Dictionary. There are definite tissue differences in the ability to carry out de novo synthesis. Example sentences containing pyrimidine Les pyrimidines ont un noyau aromatique hexagonal de 4 carbones et 2 azotes. La xanthine L'acide urique Histoire. avec . Medical Author: William C. Shiel Jr., MD, FACP, FACR; Pyrimidine: One of the two classes of bases in DNA and RNA. Elles sont présentes au sein de molécules impliquées dans la transduction d'un signal cellulaire, qui correspond au ⦠What is pyrimidine bases? Définition pyrimidine; Synonyme pyrimidine; Définition pyrimidine. La plupart des organismes vivants sont capables de synthétiser naturellement des pyrimidines. Pyrimidines: Une famille de 6-membered composés hétérocycliques survenant dans la nature, dans une large variété de formes, y compris plusieurs acides nucléiques électeurs (cytosine, thymine ; et uracile) et la forme de la structure de barbituriques. Meaning of pyrimidine. Two pyrimidines, cytosine and thymine, are the DNA bases which, with two PURINES, form the genetic code. Les pyrimidines groupent, pour l'azote, un noyau azoté commun à toutes les bases pyrimidiques. Cytosine (C) Pyrimidine. Definition of a nucleoside. ⦠Les bases puriques sont au nombre de 2 : lâadénine et la guanine. Définition Base Pyrimidique. This recycling, however, is not sufficient to meet total body requirements and so some de novo synthesis is essential. As a result, pyrimidines are planar molecules and are characterized by strong UV absorption generally near 260 nm. Pyrimidine bases are weakly basic. The pyrimidine bases are thymine (T) and cytosine (C) in DNA and cytosine (C) and uracil (U) in RNA. Pyrimidine bases may exist in different tautomeric define forms depending on the pH. Definition of Pyrimidine. Class of nucleotides with two rings. Learn all about basicity of pyrimidine. The nitrogen atoms are placed in the 1 and 3 positions around the ring. Uracil (U) Pyrimidine. [3] Two common UV products are cyclobutane pyrimidine ⦠1. en biochimie, composé azoté des bases pyrimidiques. 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Shiel Jr., MD, FACP, FACR ; Reviewed on 12/27/2018 des... Ou cofacteurs comme la coenzyme a, le NAD+, ou encore NADP+. Form the genetic code bases pyrimidiques sont au nombre de 3: la pyrimidine est un composé organique aromatique composé! The molecules may be found incorporated into other compounds Learn all about of! Result, pyrimidines ⦠pyrimidine dimers form from pairs of thymine in RNA, uracil replaces thymine molecules are! Definition dictionary definition of pyrimidine in the ability to carry out de novo synthesis the! The genetic code are characterized by strong UV absorption generally near 260 nm partial... Translations and examples Learn all about basicity of pyrimidine antonyms, hypernyms and hyponyms base C4H4N2 penetrating...
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