標題: | Iron Oxide/Niobium Oxide Core-Shell Magnetic Nanoparticle-Based Phosphopeptide Enrichment from Biological Samples for MALDI MS Analysis |
作者: | Lin, Hong-Yi Chen, Wei-Yu Chen, Yu-Chie 應用化學系 Department of Applied Chemistry |
關鍵字: | Magnetic Nanoparticles;Phosphopeptides;MALDI MS;Niobium Oxide;Microwave-Heating |
公開日期: | 1-四月-2009 |
摘要: | The feasibility of using niobium oxide-coated magnetic nanoparticles (NPs) as affinity probes for selectively trapping phosphopeptides from peptide mixtures including tryptic digest of caseins, serum, and cell lysate was demonstrated in this study. Phosphopeptide enrichment was rapid when subjecting these systems to microwave heating for 1 min; the probe-target species, which were readily isolated through magnetic separation, were then analyzed using matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS). Only signals for phosphopeptides were present in the resulting mass spectra. The detection limit for monophosphopeptide was as low as 5 fmol. |
URI: | http://dx.doi.org/10.1166/jbn.2009.1022 http://hdl.handle.net/11536/7398 |
ISSN: | 1550-7033 |
DOI: | 10.1166/jbn.2009.1022 |
期刊: | JOURNAL OF BIOMEDICAL NANOTECHNOLOGY |
Volume: | 5 |
Issue: | 2 |
起始頁: | 215 |
結束頁: | 223 |
顯示於類別: | 期刊論文 |