Partial sequence(314 bp) of ASPV was cloned and used as a probe labelled with digoxigenin-11dUTP.The total RNA extracted from samples with Apple stem pitting virus and a series of dilutions of plasmid with ASPV-cDNA w...Partial sequence(314 bp) of ASPV was cloned and used as a probe labelled with digoxigenin-11dUTP.The total RNA extracted from samples with Apple stem pitting virus and a series of dilutions of plasmid with ASPV-cDNA were detected by dot blot hybridization.The results showed that the probe was sensitive and specific.The probe couldn’t hybridize with total RNA of Apple stem grooving virus,Apple mosaic virus and Apple chlorotic leaf spot virus samples as well as negative control,only hybridized with that extracted from dormant shoot infected with ASPV.The sensitivity for detection of plasmid contained ASPV-cDNA was 1.64 μg.展开更多
目的提取、克隆BALB/c小鼠乳糖酶基因L ac,了解其序列及所编码蛋白的属性,并制备L ac cDAN探针,为进一步研究乳糖不耐受奠定基础。方法取4周龄BALB/c小鼠小肠组织,用T rizo l试剂盒提取总RNA,经RT-PCR、梯度PCR获取L ac cDNA。测序鉴定...目的提取、克隆BALB/c小鼠乳糖酶基因L ac,了解其序列及所编码蛋白的属性,并制备L ac cDAN探针,为进一步研究乳糖不耐受奠定基础。方法取4周龄BALB/c小鼠小肠组织,用T rizo l试剂盒提取总RNA,经RT-PCR、梯度PCR获取L ac cDNA。测序鉴定后将序列提交NCB I G enB ank,同时利用生物信息学,对其编码产物进行预测。探针的制备采用随机引物法以地高辛标记。结果所获得的L ac cDNA编码区有912 bp,编码303个氨基酸残基,在其二级结构中存在一个糖苷键水解酶基序,C-末端有一疏水螺旋区。标记后的探针经检测,灵敏度达到1 pg/μl。结论所获得的L ac基因经鉴定确为乳糖酶基因,由它编码的蛋白产物是乳糖酶。标记的探针灵敏度很高,可以用于原位杂交实验。展开更多
文摘Partial sequence(314 bp) of ASPV was cloned and used as a probe labelled with digoxigenin-11dUTP.The total RNA extracted from samples with Apple stem pitting virus and a series of dilutions of plasmid with ASPV-cDNA were detected by dot blot hybridization.The results showed that the probe was sensitive and specific.The probe couldn’t hybridize with total RNA of Apple stem grooving virus,Apple mosaic virus and Apple chlorotic leaf spot virus samples as well as negative control,only hybridized with that extracted from dormant shoot infected with ASPV.The sensitivity for detection of plasmid contained ASPV-cDNA was 1.64 μg.
文摘目的提取、克隆BALB/c小鼠乳糖酶基因L ac,了解其序列及所编码蛋白的属性,并制备L ac cDAN探针,为进一步研究乳糖不耐受奠定基础。方法取4周龄BALB/c小鼠小肠组织,用T rizo l试剂盒提取总RNA,经RT-PCR、梯度PCR获取L ac cDNA。测序鉴定后将序列提交NCB I G enB ank,同时利用生物信息学,对其编码产物进行预测。探针的制备采用随机引物法以地高辛标记。结果所获得的L ac cDNA编码区有912 bp,编码303个氨基酸残基,在其二级结构中存在一个糖苷键水解酶基序,C-末端有一疏水螺旋区。标记后的探针经检测,灵敏度达到1 pg/μl。结论所获得的L ac基因经鉴定确为乳糖酶基因,由它编码的蛋白产物是乳糖酶。标记的探针灵敏度很高,可以用于原位杂交实验。