1000 resultados para Bioscreen C


Relevância:

20.00% 20.00%

Publicador:

Resumo:

GF14是一类在高等植物的基本代谢﹑信号转导﹑抗逆以及转录调节等多种生理生化途径中发挥重要作用的基因。这类基因是14-3-3基因家族的成员,由于启动子结构中具有一个保守的G-Box元件而得名。我们根据该类基因的保守序列合成特异性探针,从水稻中花10号花的cDNA文库中筛选到一个基因,通过全长测序以及同源比较,发现它的核酸序列与NCBI数据库中注册的水稻GF14-c基因有高达99%的同源性,并在其上游启动子区也发现了一个保守的G-Box元件,从而确定该基因是水稻的GF14-c基因,我们把它命名为OsGF14-c。OsGF14-ccDNA全长1154bp,编码256个氨基酸。序列分析表明该基因与酵母同源基因BMH2有71%的同源性,构建真核表达载体pdYES2,借助LiAC转化法将pdYES2导入BMH2缺陷型酵母菌株GG3000,筛选获得了补偿BMH2功能的重组酵母菌株PYGG。OsGF14-c基因的启动子区域具有一个典型的﹑高等植物特有的顺式作用元件G-Box元件,提示该基因可能与转录因子相互作用,洋葱表皮瞬时表达实验验证了OsGF14-c是核定位的。构建原核表达载体pGF-c2转化大肠杆菌XL1-Blue,筛选获得了表达GF14c-MBP融合蛋白的重组菌株,利用直链淀粉亲和层析纯化了OsGF14c-MBP融合蛋白。为了研究该基因在水稻的生长发育过程中所起的作用,我们以OsGF14-c基因的全长cDNA序列构建反义表达载体载体p35sCAMVF,并分别以OsGF14-c cDNA序列的特异区段以及保守区段构建了RNAi表达载体US和UT。将p35sCAMVF﹑US和UT借助农杆菌介导的转化分别导入水稻愈伤组织,培养成苗并进行遗传学分析。我们的工作对今后深入研究OsGF14-c基因的功能奠定了一定的基础。

Relevância:

20.00% 20.00%

Publicador:

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The paper presents a resume on experiments carried on mass breeding of the silver carp Hypophthalmichthys molitrix in a cement cistern through administration of crude human chorionic gonadotropin. The experiments proves that human chorionic gonadotropin (H.C.G.) can be used for mass breeding of the fish in simple enclosures, with facilities of some input and output of water and a dose of 5 mg/kg and 18 mg/kg of body weight, for males and females respectively are required for the purpose. Observations were made by using pituitary glands in similar way. For successful breeding of about 80 kg female together, the expenditure towards cost of pituitary gland and H.C.G. are respectively 275 and 117 Rs.