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Table 6 Summary of data that supports bacilli ancestry for archaea.

From: The origin of a derived superkingdom: how a gram-positive bacterium crossed the desert to become an archaeon

Trait

Supports Bacilli as ancestor of Neomura

Supports Bacilli as ancestor of the Archaea

Exclusive to Bacilli among Bacteria

Ribosomal S12 insert

Yes

Yes

Might be also be in Chloroflexi

Geranylgeranylglyceryl Phosphatase

No

Yes

Also in Bacteroides

Mevanolate pathway

Yes

Yes

In a few other bacterial genomes

Ancestors of n-linked glycoprotein

Yes

Yes

Closest hits to eukaryote genes are all from Bacilli

PyrD 1B

No

Yes

In Firmicutes and some Thermotogae

Two L7AE paralogs

Yes

Yes

Exclusive to Firmicutes

RecU

Yes

Yes

Exclusive to Firmicutes

  1. The bacilli are more similar to archaea in terms of DNA repair, ribosome structure, and lipid metabolism than any other group of bacteria.