Table 1.

Primers used in this study

Primer	Target	Sequence (5′-3′)	Position (E. coli)	Reference
24F	Bacteria	AGAGTTTGATCCTGGCT	8 to 24	(50)
1509R	Bacteria	GGCTACCTTGTTACGACT	1,510 to 1,493	(50)
1540R	Bacteria	AAGGAGGTGATCCAGCCGCA	1,541 to 1,522	(50)
Arch21F	Archaea	TTCCGGTTGATCCYGCCGGA	7 to 26	(3)
Arch915R	Archaea	GTGCTCCCCCGCCAATTCCT	935 to 915	(3)
920R	Bacteria	CCCCGTCAATTCCTTTGAGT	928 to 909	(50)