Figure 4From: Stability of toxin gene proportion in red-pigmented populations of the cyanobacterium Planktothrix during 29 years of re-oligotrophication of Lake ZürichOccurrence of inactive mcy genotypes between 1977 and 2008. Occurrence of four different inactive mcy genotypes containing either insertions or a deletion within the mcy gene cluster. Genotypes were detected by means of qPCR. The cross in the symbols indicates numbers of the respective genotype that were above the quantification limit.Back to article page