Abstract
To define the molecular basis of a TaqI site alteration in the factor VIII gene of a patient with moderately severe hemophilia A, we used a combination of genomic amplification followed by direct sequencing and oligonucleotide hybridization, to demonstrate an A-to-G substitution in exon 7 (codon 291) of this gene. This mutation generates a Gly in place of Glu at amino acid 272 of the mature factor VIII protein. The mutation arose de novo in a germ cell of the patient's mother.
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