| Name | Function |
| iolB | myo-inositol catabolism |
| iolF | D-chiro-inositol uptake |
| iolQ | control of scyllo-inositol utilization |
| iolJ | myo-inositol catabolism |
| iolI | myo-inositol catabolism |
| iolT | myo-inositol uptake |
| iolR | regulation of myo-inositol catabolism |
| iolA | myo-inositol catabolism |
| iolW | utilization of scyllo-inosose |
| iolU | utilization of scyllo-inosose |
| iolG | myo-inositol catabolism |
| iolD | myo-inositol catabolism |
| iolX | utilization of scyllo-inositol |
| iolC | myo-inositol catabolism |
| iolE | myo-inositol catabolism |
| iolS | unknown, may be involved in myo-inositol catabolism |
| iolH | unknown, may be involved in myo-inositol catabolism |
