TABLE 1.

Amplification of dsrAB genes with different primer pairs from environmental samples^a

Origin	Sample type	Template	Primer pair		Nested PCR
			DSR1F/DSR4R	dsr619AF/dsr1905BR
Carnoulès	Water from acid mine drainage	DNA	−	−	+
Mediterranean Sea	Water	DNA	−	ND	+
Etang de Berre	Sediment from brackish lagoon	DNA	+	+	+
Adour estuary	Sediment	DNA	+	ND	+

^a−, no amplification; +, amplification; ND, not done.