Table 7.

Pfam proteins that originated near LAECA and their distribution in the viral world.

PFAM ID	Description	Archaea	Bacteria	Eukaryotes	Viruses
PF00136	DNA polymerase family B	45	195	31	384
PF03104	DNA polymerase family B, exonuclease domain	45	210	31	173
PF01068	ATP dependent DNA ligase domain	45	372	31	50
PF01096	Transcription factor S-II (TFIIS)	45	1	31	44
PF00867	XPG I-region	43	0	31	37
PF04566	RNA polymerase Rpb2, domain 4	45	0	32	31
PF04567	RNA polymerase Rpb2, domain 5	45	0	32	31
PF01896	Eukaryotic and archaeal DNA primase small subunit	44	159	31	30
PF04675	DNA ligase N terminus	44	167	31	20
PF04679	ATP dependent DNA ligase C terminal region	44	248	31	20
PF00752	XPG N-terminal domain	43	0	31	16
PF00705	Proliferating cell nuclear antigen, N-terminal domain	45	0	33	10
PF01191	RNA polymerase Rpb5, C-terminal domain	44	0	32	5
PF00352	Transcription factor TFIID (or TATA-binding protein, TBP)	45	0	33	4
PF01194	RNA polymerases N/8 kDa subunit	45	0	30	3
PF01981	Peptidyl-tRNA hydrolase PTH2	45	26	30	3
PF00382	Transcription factor TFIIB repeat	45	0	32	3
PF03876	RNA polymerase Rpb7-like, N-terminal domain	42	0	31	2
PF08542	Replication factor C	44	0	31	2
PF02933	Cell division protein 48 (CDC48), domain 2	45	18	31	1
PF01599	Ribosomal protein S27a	41	0	32	1
PF02359	Cell division protein 48 (CDC48), N-terminal domain	45	44	32	1
PF01873	Domain found in IF2B/IF5	45	0	33	1
PF01253	Translation initiation factor SUI1	45	287	33	1

The Pfam familiess that originated in LAECA are more common in viruses than those that originated in LBCA.