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. 2005 Feb 1;102(6):1986–1991. doi: 10.1073/pnas.0408355101

Table 2. Retention of introns in the present study and the Bányai—Patthy study.

Fraction introns retained, %
C. elegans D. melanogaster H. sapiens
Bányai—Patthy study 24.9 19.4 77.7
Present study 22.8 18.5 75.2

For the present study, introns known to be present in the bilateran ancestor due to the presence in both animals and nonanimals are included. For the Bányai—Patthy study, introns known to be present at the time of gene formation are considered.