Fig. 5From: Consistent 1,3-propanediol production from glycerol in mixed culture fermentation over a wide range of pHPearson correlation matrix calculated from metabolite production profiles and sequencing results after 3 days of fermentation. The hatched squares correspond to negative correlations and the full squares to positive correlations. The black outlines are the result of hierarchical clustering for n = 5 groups. p-values: ** ≤0.001; *≤0.01; •≤0.05Back to article page