Abstract:
:We have used four independently isolated cDNA probes for human apolipoprotein B (apo B), to isolate overlapping genomic recombinants for the 3' portion of the apo B gene. The cDNA clones and a unique fragment from the genomic recombinant have been used to identify the human apo B gene in DNA from a series of rodent X human somatic cell hybrids. Our results provide evidence for the assignment of this gene to the short arm of human chromosome 2 (p23-pter). We have used the cDNA probes to identify three common DNA polymorphisms. The first, detected with the restriction enzyme XbaI and our probe pAB4, has a rare allele frequency of 0.48. The other two polymorphisms are detected with the probe pAB3. The enzyme MspI detects at least three alleles, with frequencies of 0.67, 0.16 and 0.15, while that detected with the enzyme EcoRI has a rare allele frequency of 0.12. The relative position of these polymorphisms has been mapped using the genomic recombinants. Investigation of a small number of haplotypes indicates that there is linkage equilibrium between the polymorphisms, which have a total polymorphism information content (PIC) value of more than 0.8. These polymorphisms will provide useful markers for genetic studies on chromosome 2 and for the analysis of the involvement of variants of the apo B gene in the development of hyperlipidaemia.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Barni N,Talmud PJ,Carlsson P,Azoulay M,Darnfors C,Harding D,Weil D,Grzeschik KH,Bjursell G,Junien Cdoi
10.1007/BF00279093subject
Has Abstract,Author List Incompletepub_date
1986-08-01 00:00:00pages
313-9issue
4eissn
0340-6717issn
1432-1203journal_volume
73pub_type
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