That is, the aim has not been to reproduce the particular experimental results at hand, as might be achieved with enough alterations of active-site models or the underlying quantum chemical methods.
The antitumoral effect of chemotherapy is believed to be enhanced by hyperthermia (41 42°C), possibly through an increase in cell membrane permeability, alteration of active drug transport, a change in cell metabolism and a decreased interstitial fluid pressure (Hahn and Shiu, 1983; Leunig et al, 1992; Kong et al, 2000).
Surface-enhanced resonance Raman scattering (SERRS) measurements in combination with AC and EIS, performed on the same electrode sample, proved that the CYP2D6 is immobilized on the HBM without evident alterations of its active site and without significant perturbations of the bilayer architecture.
Beyond the CXXCH rigidity, other alterations of the active site, likely linked to the increased rigidity of the loop, contribute to the change in reduction potential.
The transient kinetic assays, in combination with alterations of Thg1 active site residues, revealed information about the molecular function of two nucleotides visualized in the Thg1 structure.
Furthermore, temperature changes within the mesophilic range (10 to 40°C) do not result in major structural alterations of the active sites of enzymes from mesophilic microorganisms [ 26, 27].
In this study, we have used kinetic and structural methods to show that Ser237 and Arg276 act cooperatively to promote cefotaxime hydrolysis through structural alterations of the active site that better accommodate the larger cefotaxime molecule.
This has been further confirmed by the stopped-flow and EPR measurements shown below and allows the conclusion that the mutation did not cause drastic alterations of the active site geometry (which was also suggested by the ECD data).
These hydrothermal minerals are commonly found in acidic alteration zones of active geothermal areas and sulfur fumaroles (e.g., Utada 1980; Hedenquist et al. 1996).
In the case of LPS, the switching is mediated by alterations in concentration of active AP-1 protein (AP-1p) and characterized by a threshold concentration of AP-1p.
