Fig. 7
![Fig. 7](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12864-017-3815-2/MediaObjects/12864_2017_3815_Fig7_HTML.gif)
HTS data analysis. EGFR-ex20 gene libraries were prepared in parallel using NOPE and ExoI approaches for EGFR-ex20_NNN primer exclusion. a The number of detected UMI sequences with a sufficient (5+ read) coverage. b UMI coverage distribution showing the fraction of reads (Y axis) tagged with UMIs covered X times. Dashed line shows reads-per-UMI threshold selected for data analysis. c Identification of T790Â M mutation in EGFR gene in control PBMC DNA, the reference standard and their 9:1 mixture. Red and blue lines show the expected mutation frequency in the mixture and pure reference standard sample, respectively