Read and MT counts per sample. Here reads are defined as the number of raw reads that can be categorized (“categorizable”). In other words, the read matches the expected regular expression pattern for merged reads (Additional file 1: Figure S1.C). MT-Toolbox assigns each categorizable read to an MT category. MT counts are the number of MT categories (i.e. number of originally tagged DNA templates). The sum total of reads in each MT category equals the number of categorizable reads.