Figure 3.3: Sequence similarity network of 1501 nodes, each representing a set of sequences with 80% sequence identity or higher. The network was generated using an all-versus-all blast alignment at a threshold of E ≤ 10–60. This subnetwork was isolated from the whole C14 peptidase SSN. The larger connected component has 1372 nodes, and the smaller component comprises 129 nodes. The colour scheme represents eukaryote taxa as in the key. Nodes from taxa with fewer representatives in this dataset are labelled with the taxon name. The type II metacaspase connected component has three main clusters, labelled A, B and C, and this subnetwork is explored separately.