Abstract
We have used two strategies to study 14 hemophilia B families from 11 kindreds for possible carrier detection and prenatal diagnosis. First, we sequentially used the Factor IX probes (sequentially with restriction enzymes Taq I, Xmn I, and Dde I), and the linked probes p45h (Taq I), p45d (Pst I), and 52a (Taq I) for restriction fragment length polymorphism (RFLP) analysis. Second, we searched for useful variant Taq I digestion fragments using the Factor IX complementary DNA. Two separate new Taq I variants in exon VIII were identified. Using both strategies, 11 of 14 families (from 9 of 11 kindreds) were informative for further studies. In five kindreds studied in detail, the carrier status of all 11 at risk females was determined and prenatal diagnosis could be offered to the offsprings of each of the six carriers identified. Thus, in this study, we have identified a higher proportion of informative families than has previously been reported.
MeSH Terms
DNA/analysis
DNA Restriction Enzymes/metabolism
Deoxyribonucleases, Type II Site-Specific
Female
Genetic Carrier Screening
Hemophilia B/genetics
Humans
Male
Pedigree
Polymorphism, Restriction Fragment Length
Chemicals
DNA
DNA Restriction Enzymes
endodeoxyribonuclease DdeI
endodeoxyribonuclease XmnI
CTGCAG-specific type II deoxyribonucleases
Deoxyribonucleases, Type II Site-Specific
TCGA-specific type II deoxyribonucleases
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Poon M C
Chui D H
Patterson M
Starozik D M
Dimnik L S
Hoar D I
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