Fig. 1From: Integrated application of multi-omics provides insights into cold stress responses in pufferfish Takifugu fasciatusQuality analysis of metabolomics data. a PCA (Principal Component Analysis) score diagram of samples in positive ion mode. b PCA score diagram of samples in negative ion mode. c OPLS-DA (orthogonal partial least-squares-discriminant analysis) score diagram for positive ion mode. d OPLS-DA score diagram for negative ion mode. e OPLS-DA permutation test for positive ion mode. f OPLS-DA permutation test for negative ion modeBack to article page