| Column | MySQL Type | Oracle Type | Nullable | Description | 
|---|---|---|---|---|
| BioSourceWID | BIGINT | NUMBER | No | Reference to the BioSource that has this gene. | 
         
| GeneWID | BIGINT | NUMBER | No | Reference to the Gene that is present in the organism. | 
         
| Name | Columns | 
|---|---|
| BG_BIOSOURCEWID_GENEWID | BioSourceWID, GENEWID | 
| BG_GENEWID_BIOSOURCEWID | GENEWID, BioSourceWID |