beta-adrenergic sweat responses in cystic fibrosis heterozygotes with and without the delta F508 allele.

Abstract excerpt

Cystic fibrosis (CF) causes early death for most homozygotes, yet has a carrier frequency among Caucasians of about 4-5%, suggesting a heterozygote advantage. The major defect in the CF gene is a three-base deletion leading to loss of a phenylalanine residue at position 508 (delta F508) that accounts for about 68% of CF alleles in the North American population; the remaining 32% appears to consist of a large...

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