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Restriction fragment length polymorphisms (RFLPs) of peripheral leucocyte DNA in insulin-dependent diabetes mellitus (IDDM) patients and in controls were studied with Southern blot analysis. IDDM has been reportedly associated positively with the HLA-DR3 and-DR4 in Caucasians, with the HLA-DR3 and-DR9 in Chinese, and negatively with the HLA-DR2 in both Caucasians and Chinese, Using an HLA-DQβcDNA probe, an EcoRI 2.2 kb fragment is found associated with DR2 controls (r = 0.78, P=1×10~(-6)), but not with DR2 IDDM patients, their respective frequencies being significantly different (P=0.02). The authors also report here their new findings that the frequencies of the EcoRI3.0 kb and BamHI3.3 kb fragments are both decreased in the patient group (P=0.0032 and P=0.0018 respectively). This suggested certain kinds of mutation such as partial deletion or others in the IDDM patients might have caused the RFLP pattern change as compared to the normal DNA. RFLPs may provide valuable information in searching for the genetic basis of IDDM. 相似文献
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给出了用“混合型”雅可比级数的泰勒平均逼近黎普希兹函数类的点态估计。 相似文献
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血红蛋白G-Chinese的结构分析 总被引:1,自引:0,他引:1
本文报道了在中国大陆首次发现的一例Hb G-Chinese(α_2~30(B11)Glu→Glnβ_2),并应用高压液相层析和微量双偶合法等技术对其一级结构进行了分析。 相似文献
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Huntington舞蹈病的基因诊断研究于丽莉程新建陆振虞卢健冯际平冯波王亚新Huntington舞蹈病(HD)是基底神经节和大脑皮层的变性病,该病特征为中年发病,病程呈进行性,属于常染色体显性遗传性疾病。1993年发现与HD有关的新基因IT15[1... 相似文献
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我们于1981年在上诲市宝山县发现一种异常血红蛋白的两个家系,经结构分析鉴定这种血红蛋白为Hb Queens。 本文报告了这两个家系共8个成员的血红蛋白的理化性质及其一级结构分析。pH8.5醋酸纤维素薄膜电泳中均分离出一种慢速的异常血红蛋白,泳速位于HbF与Hbs之间含量为7.2~18.0%,异丙醇试验阴性,红细胞经煌焦油蓝孵育法检查亨氏小体量很少,或无亨氏小体检出,用PCMB及CM—22纤维素柱层析分离异常肽链,再用TPCK胰蛋白酶消化异常α链,经高压液相分离层析,异常肽段的氨基酸组成测定及氨基酸顺序测定。证实其α链N端第34位的亮氨酸被精氨酸所替代,因此称为血红蛋白Queens(δ2~(?)Leu→Argβ2) Hb Qneens首先由Tatsis于1979年摘要报道一例,至今未见有其它文献报道。 相似文献
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