Fig. 8
From: AfterQC: automatic filtering, trimming, error removing and quality control for fastq data
Two examples of strand bias profiling. X-axis is about the counts of relative forward strand K-MERs, while the Y-axis is about relative reverse ones. a shows a case of very little strand bias because most points are close to the line y=x, and (b) shows a case of serious strand bias because lots of points are close to X-axis and Y-axis, and repeat counts of some K-MERs are very high so the figure seems very sparse. Both files are downloaded from NCBI Sequence Read Archive (SRA), with accession numbers SRR1654347 and SRR2496735 [18]