摘要
为了解残留尿苷酶对dUTP掺入cDNAPCR产物的破坏作用。采用PAGE和DNA -EIA杂交技术检测抗污染效果和DNA杂交百分率。结果表明⑴每反应 0 2单位尿苷酶 37℃ 2 0min可获得良好的抗污染效果。⑵ 94℃ 10min可灭活尿苷酶的活性。对照组PCR产物室温放置 65h杂交效率为 94 18%。试验组 - 2 0℃保存 65h杂交效率为 87 69%、77 2 4 %、76 83% ,室温 65h杂交效率为 74 77%、72 50 %、70 2 9% ,对照组与试验组间比较差异有显著性 (P <0 0 5)。试验组间比较差异无显著性 (P >0 0 5)。以上结果证实对照组室温放置 65h杂交效率下降 5 82 % ,试验组 - 2 0℃保存下降 19 4 1% ,放置 65h下降 2 7 4 8% ,可能与残留尿苷酶有关。
To explore the destructive effect of residual uracil DNA glycosylase on dUTP incorporation to the cDNA PCR products,PAGE and DNA-EIA hybridization technique were applied to detect the efficiency of anti-contamination and the rate of DNA hybridization.In this study,it was found that:⑴Good effect could be achieved with the reaction of 2u of uracil DNA glycosylase(UDG)for 20min at 37℃.⑵UDG could be inactivated at 94℃ for 10min.The hybridization rate of control group of PCR products was 94 18% at room temperature for 65 hours.The hybridization rates of test groups at-20℃ for 65 hours were 87 69%,77 24%,76 83%,respectively.And the inactivation times of anti-contamination groups at 94℃ were“0”min,“10”min and “20”min,respectively;at room temperature for 65 hours,these hybridization rates were 74 77%,72 50%,70 29%,respectively.There were significant differences between control and rest groups(P<0 05).However,there were no significant differences between control groups(P>0 05).Our study suggested that the hybridization rate of test groups kept at-20℃ decreased 19 41%,after 65 hours,the rate decreased 27 45%,but in control group only decreased 5 82% for 65h at room temperature.So that,we conclude that the residual UDP can cause above results.
出处
《中国医师杂志》
CAS
2000年第12期713-715,共3页
Journal of Chinese Physician
