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. 2012 Feb 9;17(2):1698–1715. doi: 10.3390/molecules17021698

Figure 2.

Figure 2

(a) The principal component analysis (PCA) of the UPLC-MS concentration study data (ESI positive): DLLME extracts of tobacco cells treated with 0 nM- (control), 50 nM-, 150 nM-, 300 nM-, and 1,000 nM- ergosterol and incubated for 18 h. The scores plot shows the clustering/separation of different treatments (0 nM/control, 50 nM, 150 nM, 300 nM, and 1,000 nM) with little variation within each group. (b) The PCA of the UPLC-MS time study data (ESI positive): DLLME extracts of tobacco cells treated with 300 nM ergosterol and incubated for different time period (0 h T–24 h T) and a non-treated sample incubated for 24 h (24 h NT).