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Fig. 4 | Cancer Cell International

Fig. 4

From: Untargeted LC–MS/MS analysis reveals metabolomics feature of osteosarcoma stem cell response to methotrexate

Fig. 4

TIC analysis and PCA analysis of all samples. The results TIC analysis showed that the response intensity and retention time of each chromatographic peak under positive a and negative b ion detection modes were basically overlapped. PCA analysis showed that all samples of every group in positive c and negative d ion mode were closely clustered, indicating good repeatability in this study

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