| Function | Description |
| rnohomology | Contains data for genes that are homologous to genes in Rattus norvegicus |
| rnohomologyDATA | Genes that are Homologous to Rattus norvegicus |
| rnohomologyHGID | A vector containing all the HomoloGeneIDs for Rattus norvegicus |
| rnohomologyLL2HGID | Mappings between public database ids and NCBI's Internal HomoloGeneIDs for Rattus norvegicus |
| rnohomologyORGCODE | A data frame for mappings between organism scientific names, NCBI code, and three-letter short names for various organisms |
| rnohomologyQC | Quality control information for rnohomology |