Relationship between PCB dechlorination activity and RDase/OHRB ratio in sludge microcosms spiked with Aroclor1260 after 180 days incubation. The solid lines indicate that the sum of the mentioned RDase gene copies equals the abundance of OHRB. The dashed lines represent a 10-fold difference from the 1:1 ratio as the estimated maximum uncertainty of target gene quantification
