Research Article

Metabolic Profiling of Serum for Osteoarthritis Biomarkers

Figure 4

Volcano plots. (a) (ESI+) Volcano plot. (b) (ESI-) Volcano plot. Horizontal axis is log2 (FC) and vertical axis is -log10 ( value). The horizontal and vertical dashed lines were selected as the filtering conditions: , and or < 0.83. The differential metabolites in the top left and the top right part were obtained after filtering, yellow representing downregulation and purple representing upregulation.
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