# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.189587 Eukaryotes.2805 Animals.307508 Vertebrates.108876 Birds.41278 ccae.13732 ccae:111942135 DNA-directed RNA polymerase II subunit RPB1-like; K03006 DNA-directed RNA polymerase II subunit RPB1 [EC:2.7.7.6]