Summary of the statistics for the putative binding sites discovered for TFs published in TRANSFAC™.

Matrix AC is AC (Accession Code) field from TRANSFAC™ (naming preserved); “S. Avail.” and “S. Used” mean respectively a number of sites available in the database and used for matrix training; L and numbers in front and after columns show the number of detected sites and their length (L) respectively for mononucleotide (“mono”) and dinucleotide (“di”) optimized matrices with optimized cut-off.