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本文研究了8个独立来源的中国汉族人Leber氏病家系的患者,其中在4个家系的患者中找到了这种突变。这种转换突变使NADH脱氢酶第4个亚单位(ND_4)的第340位编码子的精氨酸转变为组氨酸,并使SfaNI酶的切割位点消失,因此可提供一种简单的诊断方法。
In this paper, we examined 8 families of Leber’s Chinese pedigrees of Chinese Han origin, of which the mutation was found in 4 pedigrees. This switch allows the arginine at codon 340 of the fourth subunit of NADH dehydrogenase (ND_4) to be converted to histidine and the SfaNI enzyme cleavage site disappears, thus providing a simple diagnosis method.