目的建立一种简便、实用的检测亚甲基四氢叶酸还原酶(MTHFR)等位基因C677 T点突变的方法，并初步观察部分健康老人和老年血管性痴呆(VD)患者中mthfr等位基因C677 T点突变情况。
Objective to establish a simple and practical method for detecting the MTHFR gene C677T mutation so as to investigate MTHFR genotypes in the healthy elder and Vascular Dementia (VD).
等位酶分析结果表明：1 .在供试材料的6个种中，在11个酶系统的24个位点上共检测到69个等位基因，位点最大等位基因数为8。
Results of allozyme analysis showed: 1. 69 alleles were detected at 24 loci of 11 enzyme systems in 6 species, with the largest number of 8 in one locus.
用2种酶系统分别对中国李进行单株聚类分析，中国李某些性状与等位酶基因位点或等位基因的相关性有待进一步研究。
In order to identify enzyme systems related to some traits of Chinese plum, we used 2 enzyme systems for individual UPGMA cluster analysis. But their collection remains to be investigated.
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