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    Mutations in aquaporin-1 in phenotypically normal humans without functional CHIP water channels

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    AgreScience 1994.pdf (18.74Kb)
    Date
    1994-09-09
    Author
    Agre, Peter
    Moulds, J. J.
    Zeidel, ML
    Smith, BL
    Preston, GM
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    Abstract
    The gene aquaporin-1 encodes channel-forming integral protein (CHIP), a member of a large family of water transporters found throughout nature. Three rare individuals were identified who do not express CHIP-associated Colton blood group antigens and whose red cells exhibit low osmotic water permeabilities. Genomic DNA analyses demonstrated that two individuals were homozygous for different nonsense mutations (exon deletion or frameshift), and the third had a missense mutation encoding a nonfunctioning CHIP molecule. Surprisingly, none of the three suffers any apparent clinical consequence, which raises questions about the physiological importance of CHIP and implies that other mechanisms may compensate for its absence.
    URI
    http://jhir.library.jhu.edu/handle/1774.2/34113
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