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堿基對 Base pair-生物名詞

放大字體  縮小字體 發(fā)布日期:2005-05-13

形成DNA、RNA單體以及編碼遺傳信息的化學(xué)結(jié)構(gòu),也就是組成堿基對的堿基包括A、G、T、C、U。嚴格地說,堿基對是一對相互匹配的堿基(即A:T,G:C,A:U相互作用)被氫鍵連接起來。然而,它常被用來衡量DNA和RNA的長度(盡管RNA是單鏈)。它還與核苷酸互換使用,盡管后者是由一個五碳糖、磷酸和一個堿基組成。


The chemical structures that form the units of DNA and RNA and that encode genetic information i.e. the bases that make up the base-pairs are A, G, T, C and U (see DNA). Strictly, a base pair is a pair of complementary bases (i.e. the A:T, G:C and A:U interactions) held together by hydrogen bonds. However, this term is used loosely as a measure of DNA and RNA length (although RNA is single-stranded). The term is also used interchangeably with “nucleotide” although the latter is composed of a five-carbon sugar joined to a phosphate group and one of the bases.

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