| Column | MySQL Type | Oracle Type | Nullable | Description | 
|---|---|---|---|---|
| EnzymaticReactionWID | BIGINT | NUMBER | No | EnzymaticReaction.WID of the Enzymatic Reaction | 
         
| PrimaryWID | BIGINT | NUMBER | No | Chemical.WID of primary compound | 
         
| AlternativeWID | BIGINT | NUMBER | No | Chemical.WID of alternate compound | 
         
| Cofactor | CHAR(1) | CHAR(1) | Yes | 'T' if this alternative is a cofactor, 'F' if it is a substrate | 
         
| Name | Columns | 
|---|---|
| ERALT_ERWID | ENZYMATICREACTIONWID | 
| ERALT_PRIMWID | PRIMARYWID | 
| ERALT_ALTWID | ALTERNATIVEWID |