| AQP | Aquaporin |
| ar/R | “Aromatic/arginine” selectivity filter |
| FPs | Froger’s positions |
| GIP | GlpF-like intrinsic protein |
| Gly | Glycine |
| GRAVY | Grand average of hydropathicity |
| HIP | Hybrid intrinsic protein |
| H2O2 | Hydrogen peroxide |
| LIP | Large intrinsic Protein |
| MW | Molecular weight |
| NH3 | Ammonia |
| NIP | Nodulin 26-like intrinsic protein |
| NPA | “Asparagine–proline–alanine” motif |
| pI | Theoretical isoelectric point |
| PIP | Plasma membrane intrinsic protein |
| Si | Silicic acid |
| SIP | Small basic intrinsic protein |
| TIP | Tonoplast intrinsic protein |
| TMH | Trans-alpha helical transmembrane region |
| TMM | Trimmed mean of M-values |
| XIP | X-intrinsic protein |