Figure 3From: The Rodin-Ohno hypothesis that two enzyme superfamilies descended from one ancestral gene: an unlikely scenario for the origins of translation that will not be dismissedSuperposition of four Class I and four Class II aaRS. Specific enzymes are colored differently and labeled. Full-length contemporary monomers are shown as surfaces that are 65% transparent, to reveal the invariant cores, shown as cartoons inside the surfaces.Back to article page