Malyarenko Dariya I, Cooke William E, Tracy Eugene R, Drake Richard R, Shin Susanna, Semmes O John, Sasinowski Maciek, Manos Dennis M
Departments of Physics and Applied Science, College of William and Mary, Williamsburg, VA 23187-8795, USA.
Rapid Commun Mass Spectrom. 2006;20(11):1670-8. doi: 10.1002/rcm.2496.
We have developed a peak deconvolution strategy that is applicable to the full mass range of a time-of-flight (TOF) spectrum. This strategy involves resampling a spectrum to create a time series that has equal peak widths (in time) across the entire spectrum, and then using the deconvolution filters we have previously described. We use this technique to deconvolve the protein mass spectra for blood serum and cell lysates acquired on three separate TOF instruments. Following deconvolution, we resolve spectral structures consistent with expected events such as multiply charged ions, matrix adducts and post-translational protein modifications. The deconvolution procedure produces a 40% improvement in the resolution and enhanced experimental sensitivity over the full length of the linear TOF record, up to m/z 150 000. This approach is particularly appropriate for automated data analysis and peak detection in dense TOF spectra.
我们已经开发出一种适用于飞行时间（TOF）质谱全质量范围的峰去卷积策略。该策略包括对光谱进行重新采样，以创建一个在整个光谱中具有相等峰宽（时间上）的时间序列，然后使用我们之前描述的去卷积滤波器。我们使用这种技术对在三台独立的TOF仪器上采集的血清和细胞裂解物的蛋白质质谱进行去卷积。去卷积后，我们解析出与预期事件（如多电荷离子、基质加合物和蛋白质翻译后修饰）一致的光谱结构。去卷积过程使分辨率提高了40%，并在线性TOF记录的全长范围内（高达m/z 150 000）增强了实验灵敏度。这种方法特别适用于密集TOF光谱中的自动数据分析和峰检测。
