May form a water-specific channel. First detected after 12 hours of development. Highly expressed after this throughout the development of the fruiting body. Detected exclusively in prespore cells, but not in prestalk cells. Aquaporins contain two tandem repeats each containing three membrane-spanning domains and a pore-forming loop with the signature motif Asn-Pro-Ala (NPA). Belongs to the MIP/aquaporin (TC 1.A.8) family.