Table 1: Quantitative distribution of the homologues with respect to origin.

Domains of biological taxonomyTitles of POB
SilaffinsSilacidinsSilicateinsSilicase

Viruses1%0.8%
Archaea 0.6%
Bacteria 38.4%
Eukaryote60%99.2%100%100%
Total number of homologues74182686249

Note: peptides and proteins belonging to the group of proteins under study shown in the list of homologues were not considered.