The principal level for controlling gene expression is at transcription and the regulators of transcription are often DNA binding proteins that activate transcription at particular promotors or other regulatory regions. 基因表达的调节主要在转录水平上进行,并且转录调控子多是一类DNA结合蛋白,通过其与受控基因启动子或其他调控元件的结合来调节目标基因的表达。
Effects of hydrogen reduction time, hydrogen content and redox circulation on CO oxidation activities of CuO CoO/ Al 2O 3 and CuO Ce 2O 3/ Al 2O 3 combustion promotors were investigated. 对CuOCoO/Al2O3和CuOCe2O3/Al2O3助燃剂受H2还原时间、还原H2含量,以及多次还原氧化循环处理后对CO氧化活性的影响在实验室进行了研究。
In the same time, addition of basic promotors enhances the electron density of Ni, and as a result, reduces the deep decomposition of CH 4 and depressed the CO chemisorption on catalyst surface, consequently, decreases the possibility of carbon deposition formation through CO disproportion. 同时,碱性助剂的添加提高了镍的电子密度,降低了CH4的深度裂解及产物CO在催化剂表面的吸附能力,从而减少了CO歧化积炭的可能性。
Effect of different GFP expression vectors with different promotors on expression efficiency in mouse embryonic stem cells and human embryonic stem cells 含不同启动子的GFP载体在不同种属的胚胎干细胞系中表达效率的研究
PRA& PRB promotors were demethylated, and the expressions of PRB mRNA increased significantly. PRA、PRB启动子出现脱甲基化,PRBmRNA表达显著上升。
Effect of Basic Promotors on the Performance of Ni/ CaO-Al_2O_3 Catalysts 碱性助剂的添加对Ni/CaO-Al2O3催化剂性能的影响
Influence of promotors on reforming activity and carbon deposition resistance for supported-ni catalysts 助剂对负载型镍催化剂重整活性和抗积炭性能的影响
Effect of Promotors on the Photocatalytic Dehydrogenation Behaviour of Aqueous Ethanol Solution 促进剂对乙醇水溶液光催化脱氢性能的影响
They were participants, products and the promotors of the fusion of Buddhism and Confucianism. They had double identities a tremendous impact on the culture of Tang Dynasty. 他们既是佛儒融合的产物,也是参与者,拥有文人和僧人的二重身份,对唐代文化产生了极大的影响。