dna

• It remains to be seen if the genes for these proteins are located on the s-1, s-2 and s-2 dnas .
  有待阐明的是这些蛋白质的基因是否都在S1和S2DNAS上。
• The committee recommended that recombination dna work at princeton be considered in this same light .
  委员会建议用同样的观点来考虑在普林斯顿的DNA重组工作。
• These are replicated individually in bacterial cells to produce a library of different dna clones .
  它们各自在细菌细胞内复制，产生不同的DNA克隆的“文库”。
• Superpure dna can be prepared using rna transcribed from dna in the course of gene expression .
  在基因表达期间，使用从DNA转录而来的RNA可制备出超纯度的DNA
• This increased optical density caused by a disassociation or melting of the dna is called hyperchromicity .
  这种由于DNA离解或融解引起的光密度增加，称之为增色效应。
• An outline of the procedure for introducing a piece of foreign dna into a cloning vector is shown in figure 1. 3 .
  图13列出了引出一段外源DNA进入克隆载体的大概步骤。
• Two major kinds of nucleic acids are found in living things: deoxyribonucleic acid or dna and ribonucleic acid or rna .
  生物中存在着两大类核酸：脱氧核糖酸和核糖核酸。
• Some success in interferon production by bacteria has recently been achieved by the recombinant dna technique .
  近年曾经应用重组DNA技术使细菌产生干扰素获得了一定成效。
• The nitrocellulose filters are then placed on wet filter paper containing alkali, which denatures the dna .
  再将硝酸纤维素滤膜置于含碱的湿滤纸上，碱的作用是使DNA变性。
• Plasmids are exta-chromosomal doublestranded, circular dna molecules found in prokaryotic and eukaryotic cells .
  质粒是在原核和真核细胞中发现的染色体外的双链环状DNA分子。