Figure 4.

Matched filter effects, example region 2. HPLC/ESI-QTOF-MS of a A. thaliana leaf extract. Extracted ion chromatogram (967.53–967.56 m/z, same sample that was used for Figure 3) and matched filter results using second derivative Gaussian with different filter widths. Negative filter values were clipped.

Tautenhahn et al. BMC Bioinformatics 2008 9:504   doi:10.1186/1471-2105-9-504
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