Major intrinsic proteins comprise a large superfamily of transmembrane protein channels that are grouped together on the basis of homology. The MIP superfamily includes three subfamilies: aquaporins, aquaglyceroporins and S-aquaporins.[2]
^Benga, Gheorghe (2012-12-01). "On the definition, nomenclature and classification of water channel proteins (aquaporins and relatives)". Molecular Aspects of Medicine. 33 (5–6): 514–517. doi:10.1016/j.mam.2012.04.003. ISSN1872-9452. PMID22542572.
^Reizer J, Reizer A, Saier Jr MH (1993). "The MIP family of integral membrane channel proteins: sequence comparisons, evolutionary relationships, reconstructed pathway of evolution, and proposed functional differentiation of the two repeated halves of the proteins". Crit. Rev. Biochem. Mol. Biol. 28 (3): 235–257. doi:10.3109/10409239309086796. PMID8325040.
^Pao GM, Johnson KD, Chrispeels MJ, Sweet G, Sandal NN, Wu LF, Saier Jr MH, Hofte H (1991). "Evolution of the MIP family of integral membrane transport proteins". Mol. Microbiol. 5 (1): 33–37. doi:10.1111/j.1365-2958.1991.tb01823.x. PMID2014003. S2CID8963595.