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Principal component analysis of metabolic data of 40 T. delbrueckii strains. (A) Scores—40 strains distribution. Colors represent the technological application or origin of the strains: ●—winemaking; ●—arboreal/soil; ●—food; ●—bread; ●—water; ●—clinical; ●—other beverages; ●—unknown origin; (B) Loadings—concentration of seven metabolites obtained by HPLC analysis, after 192 h of fermentation.
