Faster, quantitative, and accurate precursor acquisition independent from ion count.
Faster, quantitative, and accurate precursor acquisition independent from ion count.
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DOI:
10.1021/ac103079q
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发表时间:
2011-03-15
影响因子:
7.4
通讯作者:
Goodlett, David R.
中科院分区:
文献类型:
--
作者:
Panchaud, Alexandre;Jung, Sunhee;Shaffer, Scott A.;Aitchison, John D.;Goodlett, David R.
Data-dependent precursor ion selection is widely used in shotgun proteomics to profile the protein components of complex samples. Although very popular, this bottom-up method presents major drawbacks in terms of detectable dynamic range. Recently, we demonstrated the superior performance of a data-independent method we termed Peptide Acquisition Independent From Ion Count (PAcIFIC). Here, we report a faster, accurate, multiplexed and quantitative PAcIFIC method. Our results show that the time needed to perform such analysis can be decreased by 33% to 66% using modern ion trap instruments and that high mass accuracy can be applied to such a strategy. Quantification capability is demonstrated on protein standards and a whole bacterial cell lysate using isobaric tagging. Finally, we confirm in yeast the dynamic range capabilities of such a method where proteins down to less than 50 copies per cell can be monitored without sample pre-fractionation.
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