Table 3.

Oligonucleotide probes used in this study

Probea)	Sequence	% Formamide	Target group	Reference
EUB338	GCTGCCTCCCGTAGGAGT	35	Most bacteria	[58]
NON338	ACTCCTACGGGAGGCAGC	35	Competitor of EUB	[59]
ALF968	GGTAAGGTTCTGCGCGT	20	Alphaproteobacteria	[60]
BET42ab)	GCCTTCCCACTTCGTTT	35	Betaproteobacteria	[61]
GAM42ab)	GCCTTCCCACATCGTTT	35	Gammaproteobacteria	[61]
PLA886b)	GCCTTGCGACCATACTCCC	35	Planctomycetes	[62]
HGC96a	TATAGTTACCACCGCCGT	25	Actinomycetes	[63]
CF319a	TGGTCCGTGTCTCAGTAC	35	Bacteroidetes	[64]

^a) Probes were labelled with cy 3 ^b) For these probes, a competitor probe was used