Fig. 2.

The NLS-type motifs are conserved in ribosomal proteins from all known branches of the Archaea. A phylogenetic tree of life, as according to Eme et al. (2018), showing the major branches of archaeal species and a diagram illustrating high sequence conservation among NLS-type motifs in archaeal ribosomal proteins of the major groups of archaeal species, from the most ancient branches (DAPNN superphylum) to the most recently emerged eukaryote-like branch (Asgard superphylum). The numbers in each circle (e.g., +3.5 in uL3 from DAPNN) show an average net charge of an NLS-type segment in a corresponding clade of Archaea.