排序方式: 共有203条查询结果,搜索用时 703 毫秒
201.
Grass diversification in Madagascar: In situ radiation of two large C3 shade clades and support for a Miocene to Pliocene origin of C4 grassy biomes
下载免费PDF全文
![点击此处可从《Journal of Biogeography》网站下载免费的PDF全文](/ch/ext_images/free.gif)
202.
Panagiota Manolakou Giagkos Lavranos Roxani Angelopoulou 《Reproductive biology and endocrinology : RB&E》2006,4(1):59-23
Determining sexual fate is an integral part of reproduction, used as a means to enrich the genome. A variety of such regulatory
mechanisms have been described so far and some of the more extensively studied ones are being discussed. 相似文献
203.
Panagiota S. Filippou Lucy D. Kasemian Christos A. Panagiotidis Dimitrios A. Kyriakidis 《Biochimica et Biophysica Acta (BBA)/General Subjects》2008
The Escherichia coli AtoS–AtoC two-component signal transduction system regulates the expression of the atoDAEB operon genes, whose products are required for short-chain fatty acid catabolism. In this study purified his-tagged wild-type and mutant AtoS proteins were used to prove that these proteins are true sensor kinases. The phosphorylated residue was identified as the histidine-398, which was located in a conserved Η-box since AtoS carrying a mutation at this site failed to phosphorylate. This inability to phosphorylate was not due to gross structural alterations of AtoS since the H398L mutant retained its capability to bind ATP. Furthermore, the H398L mutant AtoS was competent to catalyze the trans-phosphorylation of an AtoS G-box (G565A) mutant protein which otherwise failed to autophosphorylate due to its inability to bind ATP. The formation of homodimers between the various AtoS proteins was also shown by cross-linking experiments both in vitro and in vivo. 相似文献