Fig. 2From: Lipidomics combined with transcriptomic and mass spectrometry imaging analysis of the Asiatic toad (Bufo gargarizans) during metamorphosis and bufadienolide accumulationMass spectrum of B. gargarizans at different stages. BPI (base peak intensity chromatogram) of positive and negative ions [A: positive ion; B: negative ion]. Multivariate statistical analysis of lipid molecules [C: PCA score chart; D: OPLS-DA score chart; E: model validation diagram for OPLS-DA]Back to article page