Before revision:  Focusing on the human lineage , we show that a one-parameter evolutionary model of the Birth-Death-Innovation type can explain the empirical repartition of TFs in motif families, thus identifying the relevant evolutionary forces at its origin .
After revision:  Focusing on the human lineage , we show that a one-parameter evolutionary model of the Birth-Death-Innovation type can explain the empirical repartition of TFs in motif families, and allows to highlight the relevant evolutionary forces at its origin .