Table 2. Guide to Supplementary File 3.

Column	Column Header	Explanation
1	Filenames	A unique filename coding organ, sex, age, replicate #, flowcell, lane, and library pool
2	baseCov	Per-base coverage for the top 20 ERCC sequences
3	5′ normCov	Length normalized per-base coverage of 50 bases in 5′ end across top 20 ERCC sequences
4	3′ normCov	Length normalized per-base coverage of 50 bases in 3′ end across top 20 ERCC sequences
5	5′/3′ Cov Ratio	3′ bias based on normCov
6	Gap%	Percentage of bases that were not sequenced in the top 2 ERCC sequences
7	Base Mismatch Rate	Sequencing error rate in preprocessed sequencing data