Table 1.

Information of the seven classes of growth conditions with the marker genes used for identifying the growth condition classes in M3D listed in the second column (with the gene number following in the brackets) and the number of MGC sets for each growth condition class shown in the third column

Growth conditions	Marker genes (number of genes)	Number of MGC datasets
Exponential growth	Ribosomal proteins (54)	45
Stationary growth	Ribosomal proteins (54)	131
Heat shock	Heat shock proteins (14)	54
Oxidative stress	OxyR and SoxRS regulons (61)	30
Anaerobiosis	Partial Fnr regulons (53)	55
SOS response	LexA regulon (56)	57
Nitrogen limitation	NtrC and Nac regulon (65)	34
Random	N/A	100

The ‘Random’ growth conditions (the last line in Table 1) correspond to 100 randomly selected MGCs from all the available MGC in the M3D database.