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A mild form of familial primary hypomagnesaemia characterised by extreme weakness, tetany and convulsions. Secondary disturbances in calcium excretion are observed. Only one large pedigree with 18 affected individuals has been reported in the literature. Caused by mutations in the FXYD2 gene (11q23; mutation p.Gly41Arg) which encodes the gamma subunit of the Na+/K+-ATPase, localised on the basolateral membranes of nephron epithelial cells and expressed in the distal convoluted tubule. Transmission is autosomal dominant.
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A mild form of familial primary hypomagnesemia characterized by extreme weakness, tetany and convulsions. Secondary disturbances in calcium excretion are observed. Only one large pedigree with 18 affected individuals has been reported in the literature. Caused by mutations in the FXYD2 gene (11q23; mutation p.Gly41Arg) which encodes the gamma subunit of the Na+/K+-ATPase, localized on the basolateral membranes of nephron epithelial cells and expressed in the distal convoluted tubule. Transmission is autosomal dominant.
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