McLellan T, Ames G F, Nikaido K
Genetics. 1983 Jun;104(2):381-90. doi: 10.1093/genetics/104.2.381.
Two proteins with known characteristics on one-dimensional gels were studied by two-dimensional electrophoresis to compare the sensitivities of the two methods in detecting genetic variation. Two-dimensional electrophoresis was found to be less sensitive than several types of one-dimensional gels in distinguishing variants of both proteins. Denaturation of proteins in urea in the two-dimensional method makes it possible to distinguish closely related proteins that differ from each other by units of charge. Many more types of variation in protein sequences can be distinguished on one-dimensional gels in the absence of denaturants. The estimates of heterozygosity based on two-dimensional gels are lower than those based on other methods, at least in part, because of the limited types of sequence differences that can be detected on two-dimensional gels. The application of two-dimensional electrophoresis to the measurement of genetic variation and to the detection of new mutations should be made carefully, in view of the limited sensitivity of the method in finding differences in sequence.
通过二维电泳对一维凝胶上具有已知特征的两种蛋白质进行了研究,以比较这两种方法在检测遗传变异方面的灵敏度。结果发现,在区分这两种蛋白质的变体时,二维电泳的灵敏度低于几种类型的一维凝胶。二维方法中蛋白质在尿素中的变性使得区分电荷单位不同的密切相关蛋白质成为可能。在没有变性剂的情况下,一维凝胶上可以区分更多类型的蛋白质序列变异。基于二维凝胶的杂合度估计低于基于其他方法的估计,至少部分原因是二维凝胶上可检测到的序列差异类型有限。鉴于该方法在发现序列差异方面灵敏度有限,在将二维电泳应用于遗传变异测量和新突变检测时应谨慎。