Top-ranked subsystems driving cluster separation in 222 <i>Escherichia</i> strains in LPCA.

Subsystems were ranked either according to the magnitude of the average loadings per subsystem for the first two principal components, |avg (Uj)|, or according to the average magnitude of the loadings per subsystem, avg |Uj|, see Eqs (2) and (3), respectively. † not within the top five in this ranking. ‡ not present in the original set of subsystems. (XLSX)