Aquaporins (aqps) are a family of transmembrane channel proteins mainly responsible for the transport of water, but also may transport small uncharged molecules such as glycerol (borgnia & agre, 2001), urea (litman, sogaard, & zeuthen, 2009), ammonia (saparov, liu, agre, & pohl, 2007), hydrogen peroxide (bienert et al., 2007), arsenite (liu et al., 2002), and certain gases across biological membranes (bernardino et al., 2016).. Aquaporins (aqps ) are a family of membrane water channels that basically function as regulators of intracellular and intercellular water flow. to date, thirteen aqps , which are distributed widely in specific cell types in various organs and tissues, have been characterized in humans. four aqp mono …. Aquaporins are typically composed of identical subunit proteins. water molecules traverse the narrowest portion of the water channel in single file. the presence of water channels increases the permeability of membranes to water by as much as ten-fold. aquaporins prevent us from dying of dehydration by reabsorbing 99% of the water in the kidney..
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