Fig. 3
From: Illumina error profiles: resolving fine-scale variation in metagenomic sequencing data
Quality scores: Overview of the 75th quartile of quality scores associated with errors across all data sets. The results for the R1 reads are displayed on the left and the results for the R2 reads are on the right. Data sets were grouped by library preparation method (N = Nextera, XT = NexteraXT, PL = Parkinson, S = Standard TruSeq) and substitution, insertion and deletion errors are displayed separately