Normal dna consists of four bases - adenine , cytosine , guanine and thymine ( known as a , c , g , t ) - molecules that spell out the genetic code in pairs 正常dna由四种碱基组成腺嘌呤、胞嘧啶、鸟嘌呤、胸腺嘧啶,这些分子以成对的方式组成基因的密码。
The base ratio of 1 : 1 for the bases adenine and thymine and the bases cytosine and guanine was the first clue to the specificity of base pairing in the nucleic acids 在核酸中的碱基配对高度专一性的原则决定了腺嘌呤与胸腺嘧啶,或鸟嘌呤与胞嘧啶之间的比值为1 : 1 。
Dna sequence analysis indicated that tn5gusa5 is prone to insert into low gc content regions ; guanine is a preferential base at the first place and cytosine at the last site of target sequence 在质粒上tn5gusa5也倾向于插入低gc含量区;碱基g和c分别在靶序列的首位和末尾出现的几率高。
Some tendency of tn5gusa5 transposition were found that all preferred sites of tn5gusa5 in xcc 8004 genomic dna are in at - rich regions ; target sequences of tn5gusa5 have some features that the probabilities of guanine and cytosine are high respectively at the head and tail base of target sequence ; the level of gene transcription does not influence insertion density of tn5gusa5 significantly 结果表明, tn5gusa5插入位点有一定的规律性: tn5gusa5在xcc8004基因组上倾向于插入低gc含量( 50左右的区域插入密度最高)区段;插入位点的靶序列有一定的特异性,在靶序列的首位鸟嘌呤出现的几率高,而在靶序列的末位胞嘧啶出现几率高; tn5gusa5的插入密度与该区段基因的转录水平无明显关系。
cytosineとは意味:{名} : シトシン◆【略】C cytosine meaning: Noun: cytosine 'sItu`seen A base found in DNA and RNA and derived from pyrimidine; pairs with guanine - C Derived forms: cytosines Type of: pyrimidine Part of: deoxy...cytosine en francais:n. cytosine (matière chimique)cytosine artinya:sitosinacytosine 뜻:noun, 시토신(핵산 (DNA, RNA)의 중요 성분)cytosine перевод:1) _биох. цитозин (нуклеотид)