First described in 1843, Rumen protozoa with their striking appearance were assumed to be
important for the welfare of their host. However, despite contributing up to 50% of the bio …

Dissimilatory sulfate-reducing prokaryotes (SRB) are a very diverse group of anaerobic
bacteria that are omnipresent in nature and play an imperative role in the global cycling of …

In addition to the bacteria in the rumen there are many larger (S-2SO, um long) organisms
which at various times have been designated protozoa. Of these the'ovals'(Quin's and …

A new hypothesis for the origin of eukaryotic cells is proposed, based on the comparative
biochemistry of energy metabolism. Eukaryotes are suggested to have arisen through …

A bstract The application of molecular biological methods to study the diversity and ecology
of microorganisms in natural environments has been practiced since the mid-1980s. Since …

The endosymbiotic theory for the origin of mitochondria requires substantial modification.
The three identifiable ancestral sources to the proteome of mitochondria are proteins …

The availability of complete genome sequence data from both bacteria and eukaryotes
provides information about the contribution of bacterial genes to the origin and evolution of …

Across the diversity of life, organisms have evolved different strategies to thrive in hypoxic
environments, and microbial eukaryotes (protists) are no exception. Protists that experience …

Biochemistry textbooks depict mitochondria as oxygen-dependent organelles, but many
mitochondria can produce ATP without using any oxygen. In fact, several other types of …

Metronidazole is one of the rare examples of a drug developed against a parasite which has
since gained broad use as an antibacterial agent (24). Brieffy, at Rhone-Poulenc labs in …