Fig. 4
From: Small RNA profiling of low biomass samples: identification and removal of contaminants
Confirmed and potential contaminant sequences in eluates of regular and ultra-clean RNeasy spin columns: a Levels of contaminant sequences in eluates of two batches of regular and four batches of ultra-clean spin columns, based on qPCR; ultra-clean batches 1 and 2 are cleaned-up versions of regular batch 2 and ultra-clean batches 3 and 4 are cleaned-up versions of regular batch 3; error bars indicate one standard deviation; data points are available in Additional file 2: Table S11. b and c Numbers of different further potential contaminant sequences on the regular and ultra-clean spin columns from two different batches. d Total levels of further potential contaminant sequences, based on sRNA sequencing data normalised to spike-in levels. Cpm counts per million