3.4.22.49 ? x * 200000, GFP-tagged enzyme, SDS-PAGE 732670 3.4.22.49 ? x * 72900, deduced from nucleotide sequence 638860 3.4.22.49 additional information the human separase is composed of three domains: the tail, the trunk, and the head, structure modeling. The first two domains are spanned by Armadillo, ARM, repeats, which are composed of multiple 42 amino acid repeats and are present in the proteomes of all eukaryotic organisms. The ARM repeat domain is highly conserved right-handed super helix of ?-helices, which serves as molecular scaffold for protein-protein interactions. Phosphorylation and potential autocleavage sites span the region of the last ARM repeats and the central unstructured region. Human separase has an N-terminal region spanned by 26 ARM repeats and separated from the 718194