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对四株蓝氏贾第虫［三株分离自中国（Ｃ１、Ｃ２、Ｃ３）］，一株分离自美国（ＣＤＣ）］的可溶性蛋白和同工酶分别用ＳＤＳ—ＰＡＧＥ和ＰＡＧＥ法进行分析。结果表明，每一受试虫株在ＳＤＳ—ＰＡＧＥ中均显示出众多蛋白带，其主带数目分别为９、１３、１３、１１。大多数带的分子量介于１７．５ＫＤａ～９４ＫＤａ之间。同工酶分析结果表明，在酯酶（ＥＳＴ）分析中，ＣＤＣ出现４条带，其中３条深染。Ｃ３呈现３条浅带，但Ｃ１和Ｃ２未见条带出现。在酸性磷酸酶（ＡＰ）分析中，三个中国虫株均各出现１条浅带和１条深带，而在ＣＤＣ中只出现１条。在苹果酸脱氢酶（ＭＤＨ）分析中，Ｃ１可见１条带，而在Ｃ３为２条，Ｃ２和ＣＤＣ未见条带。在苹果酸酶（ＭＥ）分析中，中国三个虫株均各出现１条带，而ＣＤＣ则无
Four isolates of Giardia lamblia [three isolates from China (C1, C2, C3)] and one isolator from the USA (CDC) were analyzed by SDS-PAGE and PAGE, respectively. The results showed that each strain tested showed many protein bands in SDS-PAGE, the main bands were 9,13,13,11 respectively. Most bands have molecular weights between 17.5 and 94 kDa. Isozyme analysis showed that there were 4 bands in CDC and 3 of them were deep-stained in EST analysis. C3 showed three shallow bands, but no bands C1 and C2 appeared. In the analysis of acid phosphatase (AP), there were 1 shallow zone and 1 deep zone in each of three Chinese insect strains, and only 1 in CDC. In malate dehydrogenase (MDH) analysis, one band was observed for C1, two bands for C3 and no bands for C2 and CDC. In the malic acid enzyme (ME) analysis, there were 1 band in each of the three Chinese strains, while none in CDC