Fig. 1From: Characterization and remediation of sample index swaps by non-redundant dual indexing on massively parallel sequencing platformsPercent contamination over time for whole genomes sequenced on HiSeqX. Panel at left:Â Single indexed PCR-free library contamination by month. Contamination significantly increased when we began 8-plex pooling and worsened as we introduced 24-plex pooling. Panel at right:Â Single indexed PCR-plus library contamination by month. Although overall contamination was lower for PCR-plus, rates did increase significantly as well when we began poolingBack to article page