Error rates per kilobase, raw and corrected.

aReported average coverage of 2× assembly.
bBased on observed differences between aligned 2× and ENCODE sequences. Note that, because estimates are based on >2Mb of aligned sequence in all cases and >10Mb in most cases (Table S2), the contribution of sampling error to the estimates shown here is negligible (standard errors are typically ≈0.01 per kb).
cEstimate of polymorphism rate (based on highest quality bases).
dCorrected error rate, equal to raw difference rate minus estimated polymorphism rate.
eThe guinea pig is shown for comparison. The genome assembly reflects −7× coverage. The low estimated polymorphism rate may result from the use of the same inbred line in the 2× and ENCODE projects (unconfirmed).