Summary of the evolution of the KRTAP gene repertoires in eight mammals. Major events in the evolution of the KRTAP gene family are summarized. The number of KRTAP genes in each species is indicated on the right with "all", "HS", and "HGT" indicating patterns for all, high/ultrahigh cysteine, and high glycine-tyrosine KRTAPs, respectively. The columns represent the numbers of intact, interrupted and all genes and the percentage of pseudogenization calculated as the ratio of number of disrupted gene to all genes, for each of the categories of genes. Stars in the phylogeny indicate the origin of subfamilies, while circles indicate losses.