Table 3.

Transcription-associated proteins in the four complete archaeal genomes with homologs present in Bacteria and Eukarya

Protein Family	M. Jannaschii	A. fulgidus	M. thermoautotrophicum	P. horikoshii
RPA2-RPB2-RPC2/RpoB/(B′/B′′)*	MJ1040/MJ1041	AF1886/AF1887	MTH1049/MTH1050	PH1546|PHCB019
RPA1-RPB1-RPC1/RpoC/(A′/A′′)*	MJ1042/MJ1043	AF1888/AF1889	MTH297-MTH298-MTH299/†MTH1051/MTH1052	PH1544|PHCB021/ PH1545|PHCB020
Thiamine phosphate phosphorylase/ThiE antagonist TenI		AF2074		PH1156|PHBU011
Transcriptional activator TenA				PH1160|PHBU007, PH1161|PHBU006
Biotin operon repressor BirA Acetyl-CoA:CO2 ligase	MJ1619	AF0074	MTH1916	PH0147|PHDC003
SNF2/RAD54 DNA helicase family, transcription regulator		AF2350		PH0900|PHAK019
SIR2 family		AF0112, AF1676		PH0947|PHAR015
Enolases, C-myc promoter-binding repressor (MBP1) homologs	MJ0232	AF1132	MTH43	PH1942|PHBT042
Nucleoside diphosphate kinase, C-myc transcriptional activator PuF	MJ1265	AF0767	MTH258	PH0698|PHCF002
Histone deacetylase/AcuC/AphA family	MJ0535	AF0130, AF1286, AF2290	MTH1194	PH1267|PHBJ007
DNA2/NAM7 helicase	MJ0104	AF1388, AF1960	MTH487, MTH1634	PH0109|PHBN009, PH0909|PHAK010
Helicase RAD25/XPB (TFIIH 90 kDa)		AF0358		PH0450|PHCJ004, PH0210|PHBW005
Helicase RAD3/XPD (TFIIH)/DinG	MJ0942			PH0697|PHCF001
Transcription elongation factor SPT5/NusG	MJ0372	AF0537	MTH1678	PH0002|PHBC038
Sum 61 (14)	11 (9)	18 (12)	14 (8)	18 (14)

^*, Different subunits of one factor and not necessarily homologous;  

^†, Second gene for A′ Polymerase subunit