| Function | Description |
| drehomology | Contains data for genes that are homologous to genes in Danio rerio |
| drehomologyDATA | Genes that are Homologous to Danio rerio |
| drehomologyHGID | A vector containing all the HomoloGeneIDs for Danio rerio |
| drehomologyLL2HGID | Mappings between public database ids and NCBI's Internal HomoloGeneIDs for Danio rerio |
| drehomologyORGCODE | A data frame for mappings between organism scientific names, NCBI code, and three-letter short names for various organisms |
| drehomologyQC | Quality control information for drehomology |