Extensive mitochondrial dna polymorphisms were found among lagurus lagurus , mus musculu ， rattus norvegicus and mice . the findings will help us to understand the dispersion and evolution of these animals 通过琼脂糖凝胶电泳对这些片段进行测定，同时估算出草原兔尾鼠线粒体dna的长度约为16 . 6kb 。
3 . to study physical and chemical property of dnaase the purified dnaase reacted with circular pbv220 - y - inf for an hour at 37 , then the producetion was detected by 1 % agrose gel 双胸蚓组织中dna酶的酶学性质研究将纯化的dna酶分别与环状pbv220 - ? inf37反应1小时后，用1的琼脂糖凝胶电泳对其反应产物进行观察。
The 2nd pair of primers was designed according to the sequence of strain th - 98 collected in genbank . concentration of tp was analyzed after amplification invitro by rt - pcr , purified by low melt agarose and labeled by digoxigenin 根据genbankth - 98株序列设计第2对引物，应用rt - pcr方法体外扩增该片段(命名为tp ) ，琼脂糖凝胶纯化后测定其浓度和纯度，进行非放射性地高辛标记。
Puried and identified by gel electrophoresis , the plasmid pbl29 is cccdna and the molecular weight of the plasmid pbl29 was estimated to be about 3 . 7kb . the sensitivity of bacillus iicheniformis29 to 18 antibiotics was determined by inhibitory zone with filter paper Licheniformis29菌株中抽提得到质粒pbl29 ，纯化后通过琼脂糖凝胶电泳观察，确证质粒pbl29为闭合环状质粒、分子量3 . 7kb左右。
In order to discuss the application of sol - gel in the preparation of biomembrane , the gel membrane of agarose was prepared by sol - gel with acticarbon and agarose as raw material , at the same time , the catalytic activity of immobilized cod based in the membrane was studied 为探讨生物传感器用膜的制备，采用溶胶-凝胶法，以活性炭微粉和琼脂糖制备了琼脂糖凝胶薄膜并研究了薄膜固定cod的催化特性。
2 . cloning of the pcr products the pcr products were purified by agarose gel electrophoresis and was ligated with pucm - t vector . by the method of pcr and enzyme digest analysis . the result shows that the plasmid containing cpti gene was transferred into e . coli dhso Pcr产物的克隆采用a / t克隆法，将pcr产物经琼脂糖凝胶电泳纯化回收后用t4连接酶与pucm - t载体连接，构建成克隆载体puc - cp ，转化大肠杆菌dh _ 5 。
A final period of extension was carried out for 9 min and final holding at 4 . the pcr products were resolved after electrophoresis in 2 % agarose gel with ethidium bromide . the pcr products were visualized while the gel was exposed to ultraviolet light 扩增产物在2琼脂糖凝胶上电泳，用pcrmarker作分子量标准，紫外灯下观察，最适pcr反应条件为扩增出最强的sry产物带而无非特异性扩增带出现时的反应条件。
The high purity of genomic dna extracted by tripure isolation reagent was observed . dna agarose gel electrophoresis showed that the genome had a high integrity without degradation . and also , spectrophotometric analysis indicated that the genomic dna had no pollution by protein and rna . 2 培养乳酸乳球菌nizor5 ，收集菌体，用tripurelsolationreagent提取其基因组dna ，琼脂糖凝胶电泳，紫外显示仪下可见在点样孔附近有一条整齐均一的dna带。
The apoptosis induced by extract of russula subnigricans hongo was investigated in little white rat liver and kidney cells by agarose gel electrophoresis . the result showed that agarose gel electrophoresis of dna extracted from poisoned little white rat liver and kidney cells revealed typical 180 ~ 200bp integer - fold " ladder " " bands . apoptosis induced by extract of russula subnigricans hongo was dose - and time - dependentthe result indicated that extract of russula subnigricans hongo could induce apoptosis in little white rat liver and kidney cells 4 .用电泳技术研究亚稀褶黑菇粗毒液诱导小白鼠肝肾细胞凋亡，小白鼠亚稀褶黑菇抽提液中毒后，肝肾细胞. dna经琼脂糖凝胶电泳出现180一200bp整数倍的ona梯形带， 19 . 09 / l一28 . 59 / l范围内，亚稀褶黑菇提取液诱导肝肾细胞凋亡表现出时间和剂量依赖性
Recovered the agarose and identified by agarose gelelectrophoresis . the producys of pcr fragments and pcambial303 plasmid ligation were transformed into e . coli ( dh5a ) . the result of pcrof positive recombinant and restriction analysis demonstrated that the plant expressing vector of tps is attained Pcr产物经回收后，经琼脂糖凝胶电泳鉴定后，与pcambia1303连接并转化大肠杆菌dh5a ，阳性重组子经pcr和限制性内切酶酶切图谱分析，表明已获得海藻糖- 6 -磷酸合成酶基因的植物表达载体。
