Digital MDA for enumeration of total nucleic acid contamination.
Digital MDA for enumeration of total nucleic acid contamination.
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DOI:
10.1093/nar/gkq1074
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发表时间:
2011-03
影响因子:
14.9
通讯作者:
Quake SR
中科院分区:
文献类型:
--
作者:
Blainey PC;Quake SR
Multiple displacement amplification (MDA) is an isothermal, sequence-independent method for the amplification of high molecular weight DNA that is driven by ϕ29 DNA polymerase (DNAP). Here we report digital MDA (dMDA), an ultrasensitive method for quantifying nucleic acid fragments of unknown sequence. We use the new assay to show that our custom ϕ29 DNAP preparation is free of contamination at the limit of detection of the dMDA assay (1 contaminating molecule per assay microliter). Contamination in commercially available preparations is also investigated. The results of the dMDA assay provide strong evidence that the so-called ‘template-independent’ MDA background can be attributed to high-molecular weight contaminants and is not primer-derived in the commercial kits tested. dMDA is orders of magnitude more sensitive than PCR-based techniques for detection of microbial genomic DNA fragments and opens up new possibilities for the ultrasensitive quantification of DNA fragments in a wide variety of application areas using MDA chemistry and off-the-shelf hardware developed for digital PCR.
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影响因子:
4.5
作者:
Marcy, Yann;Ishoey, Thomas;Lasken, Roger S.;Stockwell, Timothy B.;Walenz, Brian P.;Halpern, Aaron L.;Beeson, Karen Y.;Goldberg, Susanne M. D.;Quake, Stephen R.
通讯作者:
Quake, Stephen R.
DOI:
10.1073/pnas.0808028105
发表时间:
2008-10-07
影响因子:
11.1
作者:
Pan, Xinghua;Urban, Alexander Eckehart;Weissman, Sherman M.
通讯作者:
Weissman, Sherman M.
DOI:
10.1073/pnas.89.13.5847
发表时间:
1992-07-01
影响因子:
11.1
作者:
ZHANG, L;CUI, XF;ARNHEIM, N
通讯作者:
ARNHEIM, N
影响因子:
3.7
作者:
Rodrigue S;Malmstrom RR;Berlin AM;Birren BW;Henn MR;Chisholm SW
通讯作者:
Chisholm SW
影响因子:
14.9
作者:
Zhang, YL;Zhang, DB;Cao, W
通讯作者:
Cao, W