TABLE 2.

Numbers of probes used in the FGA-I functional groups

Functional group	No. of gene categories	No. of probes
Carbon degradation	13	422
Carbon fixation	4	131
Contaminant degradation	90	733
Phosphorous metabolism	4	81
Nitrogen cycle	3	319
Sulfur cycle	2	204
Metal resistance	1	83
16S rRNA (positive control)		2
Human (negative control)		20
Arabidopsis thaliana (negative control)		11
Total	127	2,006