| I-2 | Inhibitor 2 |
|---|---|
| I-3-C | Indole-3-carbinol |
| I-4AA | imidazole-4-acetic acid |
| I-CAM | Inter-Cellular-Adhesion-Molecule |
| i-CGRP | immunoreactive CGRP |
| I-CRF | Immunoreactive corticotropin-releasing factor |
| I-CT | Immunoreactive calcitonin |
| I-E | Internal-External |
| I-E | inspiratory-expiratory |
| I-FABP | Intestinal fatty acid binding protein |