Fig. 4From: Metagenomic community composition and resistome analysis in a full-scale cold climate wastewater treatment plantGene copy numbers of selected genes per milliliter of sample (A) and per nanogram of DNA (B) for the various wastewater treatment processes over a four-month period. The black lines represent the mean for each treatment over four months. Effluent (EFF), returned activated sludge (RAS), raw sewage/influent (RS), negative control (NEG), October (T1), November (T2), December (T3), February (T4). *DNA concentration was below the detectable limit therefore gene copy number per nanogram of DNA could not be quantifiedBack to article page