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Table 2 Correlation analysis of the variation of the 3PGA pool compared to all monitored metabolites of this study

From: Systems analysis of ethanol production in the genetically engineered cyanobacterium Synechococcus sp. PCC 7002

Metabolite Pearson’s correlation coefficient (r) of normalized responses
All samples Wild type Producer
Positive correlation
 Glyceric acid-3-phosphate 1.000 1.000 1.000
 Glyceric acid-2-phosphate 0.806 0.767 0.450
 Glutamic acid 0.821 0.755 0.557
 Glutamine (pyroglutamic acid, glutamate)a 0.810 0.727 0.689
 Glutamic acid, N-acetyl- 0.821 0.712 0.676
 A112003 0.716 0.789 0.718
Negative correlation
 Mannose 0.408 −0.956 −0.615
 Glucose 0.112 −0.774 −0.557
 Fructose 0.068 −0.760 −0.640
 Phenylalanine 0.011 −0.700 −0.642
 A214003 0.224 −0.733 −0.718
 A311002 −0.159 −0.732 −0.498
  1. Pearson’s correlation coefficient of the WT subset were ranked and filtered by r > 0.70 or r < −0.70
  2. Correlation coefficients of normalized responses from all, WT, or producer samples are reported. The complete data set can be found in Additional file 1
  3. aPyroglutamic acid represents the sum of the glutamine, pyroglutamic and glutamic acid pool