Biochips that sequentially capture and focus antigens for immunoaffinity MALDI-TOF MS: a new tool for biomarker verification.
Biochips that sequentially capture and focus antigens for immunoaffinity MALDI-TOF MS: a new tool for biomarker verification.
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DOI:
10.1002/pmic.201000219
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发表时间:
2010-11
期刊:
影响因子:
3.4
通讯作者:
Stolowitz, Mark L.
中科院分区:
文献类型:
--
作者:
Brauer, Heather Ann;Lampe, Paul D.;Yasui, Yutaka Y.;Hamajima, Nobuyuki;Stolowitz, Mark L.
A novel approach to immunoaffinity MS is described wherein antibodies are appended to a patterned gold Biochip surface. The Biochip surface is patterned with an array of concentric immunocapture zones comprised of highly hydrophilic central zones surrounded by moderately hydrophilic zones that reside on a non-wetting background, with protein attachment via electrochemically cleavable linkers. After linker cleavage, matrix application forms a discrete spot suitable for MALDI-TOF-MS. Use of the Biochip to purify Transthyretin from human serum allowed distinct resolution of four disulfide conjugates and one truncated form isoforms with good mass resolution and sensitivity.
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