Table 1. Shotgun bisulfite sequencing of human and chimp sperm methylomes.

Reads: total read ends sequenced (before filtering based on quality). Unique mapped: reads mapping optimally to a single location in the reference genome. Distinct reads: number of genomic locations to which a read maps; when multiple reads map to the same position, one with the best mapping score was selected at random, and all others discarded. Mismatches: average number of mismatches for the reads indicated in the distinct fragments column. Bisulfite conversion rate was calculated at non-CpG cytosines. Percent methylation: proportion of Cs in reads mapping over CpG dinucleotides. Parentheses indicate data from individual donors; sperm without parentheses indicates pooled donors.