The “single-family” enzymes (FKBP, CyP) are shown for comparison only. The proteins are named by the initials of the organism (Dm, Drosophila melanogaster; Hs, Homo sapiens; Td, T. denticola; At, Arabidopsis thaliana) followed by the domain name(s) and the theoretical molecular mass in kDa. The accessory domains, i.e. TPR, WD40, and the putative CaM-binding domains, are also indicated. CyP domains are black rectangles, and FKBDs are white.