Multiple cross-species comparisons for the representative of the Early gene TNF (A) and the Late gene ICAM1 (B). The numbers in cells represent the percentage of NF-κB - family TFBS conserved between given species. Green colour depicts comparison with less than 50% conserved TFBS. In comparison (B), the number of species is only 7, since not for all species homologous gene was found. Column N, row M entry is the fraction TFBS conserved when promoter sequence of species N is aligned to the template being promoter sequence of species M. As a result the matrices in parts (A) and (B) are only approximately symmetric.