Computational Evaluation of Glucose. Potential glucose labels are evaluated based on both absolute Z-scores and Z-scores normalized with respect to the labeling pattern with the highest score. Glucose labels are listed on top including hypothetical labeling patterns (e.g. [1,2,3-13C]) and commercially available labels (e.g. [1-13C]). [U-13C] = uniform labeled and [12C] = unlabeled. Reaction and reaction ratio hypotheses are listed on the left. The 'random' hypotheses, as described in the methods, shows the level of noise.