Abstract
2,5-Dihydroxyacetophenone (DHAP) is presented as a matrix which enables highly sensitive matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometric analysis of peptides, proteins and glycoproteins on AnchorChip targets. Depending on the protein, lower fmol amounts can be detected due to the increased homogeneity and concentration of the crystallization of the analyte/matrix mixture on the anchors. Best results could be generated in the mass range of 8-100 kDa. All sample/matrix preparation steps starting from mixing of DHAP matrix solution with sample solution to the transfer of the mixture to the MALDI-TOF target can be performed manually or automatically allowing low- and high-throughput analyses.
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