The origin of the eukaryotic cell is enigmatic and complex. Early studies of nuclear-encoded enzymes, transfer RNAs, ribosome structures and ribosomal RNA catalogues implied deep, but unresolved ...

Universal trees of life based on small-subunit (SSU) ribosomal RNA (rRNA) support the separate mono/holophyly of the domains Archaea (archaebacteria), Bacteria (eubacteria) and Eucarya (eukaryotes ...