Figure 1From: Large-scale 13C-flux analysis reveals mechanistic principles of metabolic network robustness to null mutations in yeastGenome-wide proportion of active, essential and flexible metabolic reactions during growth of S. cerevisiae (iLL672) on glucose. Flexible reactions are defined as having a non-zero flux but are not essential for growth. The number of genes that encode biochemical reactions is given in parentheses.Back to article page