FIG 6.

Rank normalization of the archaeal aCPSF1 taxonomy. In total, 779 aCPSF1 proteins were selected with each per archaeal genome/MAG (Dataset S2) that are deposited in NCBI and GTBD databases and have the identified taxonomic ranks. Sequence alignment was performed on consensus amino acids, and sequences identities at various taxonomic ranks were calculated. Box-plot diagram (upper panel) shows sequence identity distributions of 261 aCPSF1 proteins mostly from the cultured archaeal strains, and the insert shows the identities of 779 proteins at phylum and class levels. A table (lower panel) lists the median sequence identities of aCPSF1 proteins and the 16S rRNA genes (12) at various archaeal taxonomic ranks.