| Function | Description |
| mmuhomology | Contains data for genes that are homologous to genes in Mus musculus |
| mmuhomologyDATA | Genes that are Homologous to Mus musculus |
| mmuhomologyHGID | A vector containing all the HomoloGeneIDs for Mus musculus |
| mmuhomologyLL2HGID | Mappings between public database ids and NCBI's Internal HomoloGeneIDs for Mus musculus |
| mmuhomologyORGCODE | A data frame for mappings between organism scientific names, NCBI code, and three-letter short names for various organisms |
| mmuhomologyQC | Quality control information for mmuhomology |