Most prokaryotic signal-transduction systems and a few eukaryotic pathways use phosphotransfer schemes involving two conserved components, a histidine protein kinase and a response regulator protein. The histidine protein kinase, which is regulated by environmental stimuli, autophosphorylates at a histidine residue, creating a high-energy phosphoryl group that is subsequently transferred to an ...

The 6.4 s X-ray pulsar 1E 1048.1–5937 was observed by BeppoSAX in 1997 May. This source belongs to the class of “anomalous” pulsars which have pulse periods in range 5–11 s, show no evidence of optical or radio counterparts, and exhibit long-term increases in pulse period. The phase-averaged 0.5–10 keV spectrum can be described by an absorbed powerlaw and blackbody model. The best-fit photon in...

the analysis of geochemical data in frequency domain, as indicated in this research study, can provide new exploratory informationthat may not be exposed in spatial domain. to identify deep geochemical anomalies, sulfide zone and geochemical noises in dalli cu–au porphyry deposit, a new approach based on coupling fourier transform (ft) and principal component analysis (pca) has beenused. the re...

results pcslab is a weak promoter responding to come and its binding appears to be negative cooperative. although pcslab is partially controlled by comcde, it can respond to comcde regulation. supported by the obtained molecular evidence, cslab acts as a stabilizer of comcde signal on the patterns of its expression. conclusions pcslab is partially controlled by comcde. cslab is a stabilizer of ...