# OC Root 2nd 3rd 4th PC Gene/Definition OC.512445 Archaea.2691 Euryarchaeota.361 Halanaeroarchaeum.2002 hsu.823 hsu:HLASF_0844 PAS domain S-box OC.512445 Archaea.2691 Euryarchaeota.361 Halanaeroarchaeum.2002 hsf.822 hsf:HLASA_0841 PAS domain S-box