LDH (lactate dehydrogenase) isozyme activity was determined with PAGE and was compared with the available data of mtDNA polymorphism in Bos.

• 采用聚丙烯酰胺凝胶盘电泳 ,测定牛血清LDH同工酶酶活性 ,并与牛mtDNA多态资料作比较分析 ,探讨牛属(Bos)几种牛血清LDH同工酶活性 (核基因组表达的蛋白质多态 )与mtDNA多态 (核外基因组 )的关系。