Predicting Network Activity from High Throughput Metabolomics
Metabolite prediction by mummichog is in good agreement with annotation in the original studies, 97% for the human urine data  and 86% for the yeast data . The metabolites not in the original annotation (yellow) can not be compared. The “-z” option in mummichog enforces the presence of primary ion (M+H[+] for positive mode, M−H[−] for negative mode). This shifts the coverage in the huamn data set, but not much for the yeast data of limited annotation.