together with either the Cy5-labelled HGC236 probe (Actino- bacteria-specific), the Cy5-labelled ALF968 probe (Alp- haproteobacteria-specific), or the Cy5-labelled Gam42a probe (Gammaproteobacteria-specific) together with the FITC-labelled Bet42a probe (Betaproteobacteria- specific) Additional file...