A O M P K Z Y Q V D R L B C E F G H S N U J X I T W phy: a o m p k z y - - d - l b c e - g h s - - - - - t w - 40 aompkzy--d-lbce-ghs-----tw AsnS [J] COG0017 Aspartyl/asparaginyl-tRNA synthetases