Gases like H2, N2, CO2, and CO are increasingly recognized as critical feedstock in “green”
energy conversion and as sources of nitrogen and carbon for the agricultural and chemical …

Signaling by H2S is proposed to occur via persulfidation, a posttranslational modification of
cysteine residues (RSH) to persulfides (RSSH). Persulfidation provides a framework for …

Abstract Iron-sulfur (Fe/S) proteins are present in virtually all living organisms and are
involved in numerous cellular processes such as respiration, photosynthesis, metabolic …

Nitrogenases are responsible for biological nitrogen fixation, a crucial step in the
biogeochemical nitrogen cycle. These enzymes utilize a two-component protein system and …

Nitrogenase harbors three distinct metal prosthetic groups that are required for its activity.
The simplest one is a [4Fe-4S] cluster located at the Fe protein nitrogenase component. The …

Biological nitrogen fixation is catalyzed by the enzyme nitrogenase, which facilitates the
cleavage of the relatively inert triple bond of N2. Nitrogenase is most commonly associated …

▪ Abstract Iron-sulfur [Fe-S] clusters are ubiquitous and evolutionary ancient prosthetic
groups that are required to sustain fundamental life processes. Owing to their remarkable …

Biological nitrogen fixation, the conversion of atmospheric N2 to a form utilizable by higher
organisms, is catalyzed by the enzyme nitrogenase. This enzyme is found in relatively few …

During the past century, chemists have sought economical methods of fixing atmospheric
dinitrogen for use as fertilizer, explosives, and other chemicals. Despite the simplicity of the …

Superoxide promotes hydroxyl-radical formation and consequent DNA damage in cells of all
types. The long-standing hypothesis that it primarily does so by delivering electrons to …