| Function | Description |
| athhomology | Contains data for genes that are homologous to genes in Arabidopsis thaliana |
| athhomologyDATA | Genes that are Homologous to Arabidopsis thaliana |
| athhomologyHGID | A vector containing all the HomoloGeneIDs for Arabidopsis thaliana |
| athhomologyLL2HGID | Mappings between public database ids and NCBI's Internal HomoloGeneIDs for Arabidopsis thaliana |
| athhomologyORGCODE | A data frame for mappings between organism scientific names, NCBI code, and three-letter short names for various organisms |
| athhomologyQC | Quality control information for athhomology |