Additional file 2: Figure S1. Intra-category GC-content dependent characteristics of average insert size. Figure S2. Corrected NG50 plateau analysis of libraries with a read length of 189 nucleotides. Figure S3. NGA50 plateau analysis of libraries with a read length of 189 nucleotides. Figure S4. Boxplot representation of Phred scores. Figure S5. FASTQC boxplot representation of Phred scores