Pie Chart from Scientific Research

Pie chart representing the number of identified lipids and unidentified lipid-like features. Total unidentified features (~8,000) were filtered to remove background ions and contaminants and retain features present in at least 80% of samples. Remaining features were further filtered based on the retention time of lipid elution (0.5–15 min) and mass-to-charge (m/z) range (200–1,500 m/z) of potential lipid species.

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