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Comparison of quantifications by qPCR and ARISA. (A) Relative abundance of clade IA within the “Ca. Accumulibacter” lineage as measured by ppk1-targeted qPCR and by ARISA, respectively, assuming that clade IA has one copy of the rrn operon per genome. (B) The ratio of “Ca. Accumulibacter” 16S rRNA genes to those from the total bacterial community as determined by qPCR and ARISA, respectively.
