Number of metabolites responsible for the discrimination between old (reference strains) and new isolates for each experimental set.

The number of masses corresponds to those identified as CHONS in where the isotopes had been removed. SN2 refers to the cellular soluble fraction, and PELLET to the cellular insoluble fraction. Annotable masses refer to those whose molecular formula could be assigned to a given metabolite using Salinibacter ruber strains genomic data.
1- Total number of masses in the corresponding fraction for the analyzed strain; in brackets, the range of metabolites found in the different strains.
2- In brackets, the percentage of masses of the discriminative metabolome, and the corresponding set of strains set of strains (new) or (old) respectively.