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. 1991 Jun 25;19(12):3331–3335. doi: 10.1093/nar/19.12.3331

Unexpected behavior of H2Kb mutant DNAs in denaturing gradient gel electrophoresis.

C K Weber 1, D J Shaffer 1, C L Sidman 1
PMCID: PMC328331  PMID: 2062650

Abstract

Denaturing gradient gel electrophoresis (DGGE) is based upon the different melting behaviors of DNA molecules in a chemical denaturant gradient according to their sequences. This technique has recently become a widespread tool to detect mutations. The introduction of a GC-clamp enables the detection of most single base differences between two DNA molecules. As a test system we have applied the polymerase chain reaction (PCR) in combination with DGGE to detect a number of mutations in the mouse H2Kb DNA sequence. A wide variety of spontaneous in vivo mutations of this haplotype have been reported in the C57BL/6J mouse strain and are clustered in the alpha 1 and alpha 2 domains. The combination of PCR and DGGE revealed almost all base changes present in the H2Kb mutants used. However, most of the PCR products of these mutants showed melting behavior which is not easily predicted. We suggest that in addition to current simple theory, which considers that the migration of a DNA molecule in a denaturing gradient depends primarily on its initial melting behavior, additional factors such as secondary structure in partially melted molecules may play a role and can be used to detect mutations.

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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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