... in the mammalian kidney [2,4,5] and plant roots [6,7]. The yeast Saccharomyces cerevisiae has four such MIP channels: the aquaporins Aqy1 and Aqy2 and the aquaglyceroporinsFps1 and Yfl054 [8]. Aqy1 ... (MIP) family] have been found in archea,eubacteria, fungi, plants, animals and human [2,3]. Aqua-porins facilitate the diffusion of water across biologicalmembranes while the closely related aquaglyceroporinsmediate ... Sweden;3Swansea Clinical School, University of Wales Swansea, UK;4School of Lifeand Health Sciences, Aston University, Birmingham, UKAquaporins and aquaglyceroporins mediate the transport of waterandsolutesacrossbiologicalmembranes.Saccharo-myces...