| ID | Sequence | Length | GC content |
|---|---|---|---|
| CCACCAGAAGACGAUUAAGCCACAGCCUCUAAUUGGAACGGCAUUUGUA… | 2631 nt | 0.4265 | |
| AAAAUCUUUUCUGGACCAGGGCCCGUCACUGUGAUUUGGCAACACAACU… | 2666 nt | 0.4295 | |
| CCACCAGAAGACGAUUAAGCCACAGCCUCUAAUUGGAACGGCAUUUGUA… | 2849 nt | 0.4356 |
The aquaporins are a family of water-selective membrane channels. This gene encodes a member of a subset of aquaporins called the aquaglyceroporins. This protein allows passage of a broad range of noncharged solutes and also stimulates urea transport and osmotic water permeability. This protein may also facilitate the uptake of glycerol in hepatic tissue . The encoded protein may also play a role in specialized leukocyte functions such as immunological response and bactericidal activity. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2016]
A study in mice and human forensic autopsy cases demonstrated that intrapulmonary expression of the AQP9 was significantly suppressed specifically in freshwater drowning compared to saltwater drowning, postmortem immersion, and other causes of death, providing a basis for differential diagnosis [Hayashi et al. DOI:10.1007/S00414-008-0235-5]. In a separate human study evaluating mRNA markers for blood identification, the AQP9 showed cross-reactivity with vaginal secretion and low expression in saliva, leading to its exclusion from the final validated multiplex assay due to insufficient specificity [Haas et al. DOI:10.1016/j.fsigen.2010.09.006].