Before revision:  This "redundancy" of binding defines a way URLanizing TFs in "motif families" that goes beyond the usual classification based on protein structural similarities. Since the TF binding preferences ultimately define the  target genes, the motif URLanization entails information about the structure of transcriptional regulation as it has been shaped by evolution.
After revision:  This "redundancy" of binding defines a way URLanizing TFs in `motif families' by grouping TFs with similar binding preferences. Since these ultimately define the target genes, the motif URLanization entails information about the structure of transcriptional regulation as it has been shaped by evolution.