A second practical finding from the present study is that standard fluorophores commonly used in conjunction with the 488 nm excitation in FDS-SV, such EGFP and fluorescein and its derivatives, would seem unlikely to undergo significant photobleaching under the scanning illumination conditions of the FDS, unless applying extreme solvent conditions.
The soluble bacterial CYP51 orthologue from Mycobacterium tuberculosis lacking the N-terminal transmembrane domain demonstrates the extreme solvent exposure of the heme prosthetic group due to the bent I-helix and the unusual conformation of the BC-loop, which remains wide open even when inhibitors or substrate analogues are bound in the active site.
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Since invariant and semi-invariant phase relationships of direct methods are derived using the assumption that the electron density is atomic, extreme disorder of solvent may lead to difficulties at the structure solution stage.
Lipases show varied stability toward presence of organic solvents, extreme pH conditions and ionic liquids.
Even where the modifications have been made previously, enzymatic routes may be preferable because the chemical processes include extreme pH conditions, solvents that push the limits of acceptability for health and other reasons, and substrates such as anhydrides and acid chlorides [ 2].
Intermediate models varying between the extremes of elaborate explicit solvent models and simple fixed-conformation molecular mechanics models have also been developed to fit into the hierarchical approach to drug design.
However, their usefulness in industry is limited by low activity and stability at high temperatures, extreme pH, presence of organic solvents and detergent ingredients.
TEWL may increase due to disruption of the skin barrier (wounds, scratches, burns, exposure to solvents or surfactants, extreme dryness) and is affected by humidity, temperature, season and moisture content of the skin (hydration level) [42].
The cleaning process was carried out with extreme care because piranha solution is highly reactive and may explode when in contact with organic solvents.
Such extreme measures have been employed before: solvents, disc sanders, routers, axes, flamethrowers and shotguns have all been used by one painter or another.
