Table 2. Fluorescent probes used in this study.

Specificity	Probe name	Sequence (5’-3’)	Fluorescent dye	% Formamide	References
Archaea	Arch915	GTGCTCCCCCGCCAATTCCT	Cy3	10–20–30–40	[67]
Eubacteria	Eub338	GCTGCCTCCCGTAGGAGT	Cy3 or Cy5	10–20–30–40	[68]
Gamma proteobacteria	GAM42a	GCCTTCCCACATCGTTT	Cy3 or Cy5	10–20–30–40	[69]
Epsilon proteobacteria	EPSY549	CAGTGATTCCGAGTAACG	Cy3 or Cy5	10–20–30–40	[70]