A (adenine)
In genetics, A stands for adenine, one member of the A-T (adenine-thymine) base pair in DNA. The other base pair in DNA is G-C (guanine-cytosine). Each base pair forms a "rung of the DNA ladder." A DNA nucleotide is made of a molecule of sugar, a molecule of phosphoric acid, and a molecule called a base. The bases are the "letters" that spell out the genetic code. In DNA, the code letters are A, T, G, and C, which stand for the chemicals adenine, thymine, guanine, and cytosine, respectively. In DNA base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine. Adenine is also one of the bases in RNA. There it always pairs with uracil (U). The base pairs in RNA are therefore A-U and G-C.

Medical dictionary. 2011.

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  • Adenine phosphoribosyltransferase — Adenine phosphoribosyltransferase, also known as APRT, is a human gene.cite web | title = Entrez Gene: APRT adenine phosphoribosyltransferase| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene Cmd=ShowDetailView TermToSearch=353| accessdate …   Wikipedia

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  • adénine — [ adenin ] n. f. • 1885 Adenin, en all.; du gr. adên « glande » et ine ♦ Biochim. Base azotée purique, l une des quatre bases essentielles des acides nucléiques. ● adénine nom féminin Base purique constitutive des acides nucléiques (A.D.N., A.R.N …   Encyclopédie Universelle

  • Adenine — Adenine, benannt nach der Nukleinbase Adenin, ist eine Skriptsprache, welche im Rahmen des Haystack und Oxygen Projekts vom MIT Computer Science And Artificial Intelligence Laboratory (CSAIL) in Zusammenarbeit mit NTT entwickelt wird. Ein… …   Deutsch Wikipedia

  • Adenine phosphoribosyltransferase deficiency — (also called 2,8 dihydroxyadenine urolithiasis) is an autosomal recessivecite journal |pmid=8976113 |year=1996 |month=Dec |author=Kamatani, N |title=Adenine phosphoribosyltransferase(APRT) deficiency |volume=54 |issue=12 |pages=3321–7 |issn=0047… …   Wikipedia

  • a|den|o|sine — «uh DEHN uh seen, sihn», noun. a substance, composed of adenine and a pentose, found in tissue, especially muscle tissue, and in ribonucleic acid. It is important in muscle contraction and the metabolism of sugars. Formula: C10H13N5O4 ╂[<… …   Useful english dictionary

  • adenine — [ad′ə nēn΄, ad′ənin΄] n. [ ADEN(O) + INE3] a white, crystalline purine base, C5H5N5, contained in the DNA, RNA, and ADP of all tissue: it links with thymine in the DNA structure …   English World dictionary

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