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Useful Tools
Mutation Scanning for the Clinical Laboratory: DHPLC
Abstract
This chapter describes the Transgenomic WAVE® DNA Fragment Analysis System with DNA Sep® Technology, as used in our molecular genetics diagnostic laboratories for the detection of unknown mutations. Four software packages are currently available: WAVEmaker 3.4, 4, 4.1, and most recently, Navigator. Because versions 4 and 4.1 are similar, version 4 is presented here. Denaturing high-performance liquid chromatography (DHPLC), also known as TMHA (temperature-modulated heteroduplex analysis) provides a rapid, automated scanning method for mutations, whether known or unknown. Mutations are visualized as a characteristic pattern of peaks corresponding to the mixture of heteroduplexes and homoduplexes formed when wild-type and mutant DNA fragments are hybridized (1; Fig. 1).
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Fig. 1.  Formation of a 1∶1 mixture of heteroduplexes and homoduplexes through hybridization.

Affiliation(s): (3) Wessex Regional Genetics Laboratory, Salisbury Health Care NHS Trust, Salisbury District Hospital, Salisbury, Wiltshire, UK
(4) Institute of Medical Genetics, University Hospital of Wales, Cardiff, UK
Series: Methods in Molecular Medicine  |  Volume: 92  |  Pub. Date: Oct-20-2003  |  Page Range: 45-66  |  DOI: 10.1385/1-59259-432-8:45
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