Wu Y, Stulp R P, Elfferich P, Osinga J, Buys C H, Hofstra R M
Department of Medical Genetics, University of Groningen, Antonius Deusinglaan 4, 9713 AW Groningen, The Netherlands.
Nucleic Acids Res. 1999 Aug 1;27(15):e9. doi: 10.1093/nar/27.15.e9.
Denaturing gradient gel electrophoresis (DGGE) has proven to be a powerful pre-screening method for the detection of DNA variants. If such variants occur, however, in DNA fragments that are very rich in G and C, they may escape detection. To overcome this limitation, we tested a novel gel system which combines DGGE and constant denaturant gel electrophoresis (CDGE), as it might have the advantages of both methods. Indeed, this combination had the advantages of both methods, good separation of hetero-duplex molecules and prevention of total strand dissociation, and it proved successful in the detection of DNA variants in several GC-rich fragments.
变性梯度凝胶电泳(DGGE)已被证明是一种用于检测DNA变异的强大预筛选方法。然而,如果此类变异出现在富含G和C的DNA片段中,它们可能会逃过检测。为了克服这一局限性,我们测试了一种新型凝胶系统,该系统结合了DGGE和恒定变性剂凝胶电泳(CDGE),因为它可能兼具两种方法的优点。事实上,这种组合兼具两种方法的优点,能很好地分离异源双链分子并防止链完全解离,并且在检测多个富含GC的片段中的DNA变异方面被证明是成功的。