The biological reduction of N2 is catalyzed by nitrogenase, which is irreversibly inhibited by
molecular oxygen. Cyanobacteria are the only diazotrophs (nitrogen-fixing organisms) that …

Cyanobacteria may possess several enzymes that are directly involved in dihydrogen
metabolism: nitrogenase (s) catalyzing the production of hydrogen concomitantly with the …

One of the most remarkable features of the evolutionary process is its capacity to construct.
In billions of years a primordial soup of organic compounds evolved to the theater of life …

Photosynthetic microorganisms can produce hydrogen when illuminated, and there has
been considerable interest in developing this to a commercially viable process. Its appealing …

ABSTRACT Dinitrogen (N2)-fixing microorganisms (diazotrophs) play important roles in
ocean biogeochemistry and plankton productivity. In this study, we examined the presence …

Evolutionary transitions in individuality (ETIs) involve the formation of Darwinian collectives
from Darwinian particles. The transition from cells to multicellular life is a prime example …

Most oxygenic phototrophs, including cyanobacteria, have two structurally unrelated
protochlorophyllide (Pchlide) reductases in the penultimate step of chlorophyll biosynthesis …

With the global attention and research now being focussed on looking for an alternative to
fossil fuel, hydrogen is the hope of future. Cyanobacteria are highly promising …

In many environments, biological nitrogen fixation can alleviate nitrogen limitation. The high
rates of N2 fixation often observed in cyanobacterial mats suggest that N2 fixation may be an …

This chapter reviews cyanobacterial nitrogen fixation from the perspective of the “Oxygen
Paradox”. Cyanobacteria are prokaryotes that carry out oxygenic photosynthesis similar to …