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. Author manuscript; available in PMC: 2019 Feb 13.
Published in final edited form as: Anal Chim Acta. 2014 Aug 11;848:51–60. doi: 10.1016/j.aca.2014.08.001

Fig. 4. PCA of negative ion mode mass spectra:

Fig. 4.

(a) PC2 vs. PC5 score plot. (b) PC2 vs. PC5 original loading plots labeled in terms of m/z ratio. PCA of positive ion mode mass spectra: (c) PC2 vs. PC3 score plot. (d) PC2 vs. PC3 original loading plots labeled in terms of m/z ratio. Immature oocytes (green circles, n = 31), 24-hour in vitro matured oocytes (red diamonds, n = 25), 44-hour in vitro matured oocytes (blue triangles, n = 40).