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. 1989 Sep 12;17(17):6855–6864. doi: 10.1093/nar/17.17.6855

Rapid detection and sequencing of alleles in the 3' flanking region of the interleukin-6 gene.

A M Bowcock 1, A Ray 1, H Erlich 1, P B Sehgal 1
PMCID: PMC318417  PMID: 2789373

Abstract

The 3' flanking region of the interleukin 6 gene is polymorphic due to insertions of different size. Within this region lies a sequence of approximately 500 base pairs that is AT rich. Based on flanking sequence information we have constructed oligonucleotides which prime the polymerase chain reaction (PCR) and amplify this AT rich region. The amplification products visualized by agarose gel electrophoresis gave fragment sizes for both homozygous and heterozygous individuals that were concordant with those observed by conventional genomic blotting techniques. Alleles that could not be typed by Southern analysis were resolved with this approach. These results illustrate the value of PCR for the rapid detection of length polymorphisms such as those due to variable numbers of tandem repeats. In contrast to RFLP analysis this procedure takes less than a day to perform, is cheaper, avoids the use of radioactivity and requires far less substrate DNA. Three different human alleles were sequenced, and differences were detected that were due to both large duplications and loss of one or two bases, suggesting that AT rich regions identify highly polymorphic loci. The same primers also amplified non-human primate DNA, allowing a comparison of the human sequence with that of the common chimpanzee and baboon.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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