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. 1982 May 11;10(9):2791–2807. doi: 10.1093/nar/10.9.2791

Isolation and characterisation of the Xenopus laevis albumin genes: loss of 74K albumin gene sequences by library amplification.

F E May, R Weber, B R Westley
PMCID: PMC320656  PMID: 6285309

Abstract

The blood of the frog X.laevis contains 2 albumins of 68,000 and 74,000 daltons which are encoded in the liver by two related mRNAs. When an amplified X.laevis DNA library was screened with cloned albumin cDNA only 68,000 dalton albumin gene sequences were isolated. Hybridisation of the albumin cDNA to Southern-blots of Eco R1 digested X.laevis DNA showed that the sequences present in the recombinants did not account for all the fragments which hybridised on the Southern-blots. This indicated that 74K albumin gene sequences exist but that they are not present in the amplified DNA library. A X.laevis genomic library was therefore constructed and screened for albumin genes without amplification. Both 68K and 74K albumin gene sequences were isolated. Recombinants containing 74K albumin gene sequences grew extremely poorly and this probably explains why the 74K albumin sequences were ot isolated from the amplified library. Characterisation of the cloned DNA indicates that there is one sequence coding for the 68K albumin but two different sequences coding for the 75K albumin.

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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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