# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.335778 Eukaryotes.770615 Protists.102884 Alveolates.48654 Ciliates.21739 tet.12560 tet:TTHERM_00401980 histidine-tRNA ligase; K01892 histidyl-tRNA synthetase [EC:6.1.1.21]