| CDS description | CDS accession | Island | Host Description |
|---|
| 50S ribosomal subunit protein L21 | NC_005061:96536:102286 | NC_005061:96536 | Candidatus Blochmannia floridanus, complete genome |
| 50S ribosomal subunit protein L21 | NC_010118:133256:168246 | NC_010118:133256 | Candidatus Sulcia muelleri GWSS, complete genome |
| 50S ribosomal subunit protein L21 | NC_013716:4885776:4887007 | NC_013716:4885776 | Citrobacter rodentium ICC168, complete genome |