Table 2 Summary of errors and richness estimates when different criteria were used to merge OPFs. OPFs were merged when at least one peptide fragment in each OPF overlapped at least 5 aa and had a BSR value that was above the user specified level by the merge penalty. The type I error rate is the fraction of OPFs from the closed genome that correspond to multiple OPFs from the individual sequence reads. The type II error rate is the fraction of OPFs from the individual sequence reads that corresponded to more than one OPF from the closed genome sequence.

From: A statistical toolbox for metagenomics: assessing functional diversity in microbial communities