Here, the discovery of mutant [FeFe] hydrogenases with decreased oxygen sensitivity is described.
In other words, life is historically constrained and survivability is historically contingent (i.e., oxygen sensitivity of vital enzymes).
When both reactions were present, a cross-linked network formed and reduced oxygen sensitivity.
Also, the oxygen sensitivity of the free-radical polymerization of methacrylate and acrylate was compared.
The oxygen sensitivity was measured between 377 °C and 577 °C under different oxygen partial pressures.
[FeFe] hydrogenases catalyze the rapid combination of protons and electrons into hydrogen, but their oxygen sensitivity limits their use in clean renewable hydrogen production applications.
The production of hydrogen in green algae is catalyzed by hydrogenases, which are small monomeric enzymes with high conversion efficiency and high oxygen sensitivity.
Three mutations were cooperatively responsible for the decreased oxygen sensitivity, and further improvements were identified by saturation mutagenesis at the influential sites.
The oxygen sensitivity was found to be closely related to the site symmetry of Eu3+, which was previously determined by the phosphorescent spectra.
Oxygen sensitivity of 5.53 and response time of 6 s were observed from this composite with a non-linear Stern Volmer working plot.
Although hydrogenases occur in photosynthetic microorganisms, the oxygen sensitivity of these enzymes represents a significant barrier in directly coupling hydrogen production to oxygenic photosynthesis.
