Search results for Prokaryote

Biochemistry Apr 26, 2019

Fitting a right hand in a left-handed mitten

Many biomolecules come in two versions that are each other's mirror image, like a left and a right hand. Cells generally use the left-hand version of amino acids to produce proteins, and uptake mechanisms were thought to ...

Evolution Apr 23, 2019

Scientists find an underground bacterium that could live on Mars

Tomsk State University microbiologists were the first in the world to isolate Desulforudis audaxviator from deep underground waters. Translated from Latin, its name means "a brave traveler". Scientists from different countries ...

Cell & Microbiology Apr 5, 2019

A new protein structure that helps viruses with lipid membranes enter cells discovered

Many viruses, including that perennial winter affliction, the influenza virus, are protected by a lipid membrane on loan from the host cell. The fusion proteins on the surface of the membrane are tasked with merging the lipid ...

Plants & Animals Apr 1, 2019

Understanding circadian rhythms in algae and fungi

Fungi, algae, and cyanobacteria might not complain about jet lag. But like humans, their physiologies adhere to a roughly 24-hour cycle of behavioral patterns in the absence of external cues. Organisms that experience recurring ...

Astrobiology Mar 4, 2019

Complex life might require a very narrow habitable zone

Since the Kepler Space Telescope was launched into space, the number of known planets beyond the solar system (exoplanets) has grown exponentially. At present, 3,917 planets have been confirmed in 2,918 star systems, while ...

Biotechnology Feb 26, 2019

Key differences between prokaryotic and eukaryotic RNA silencing Argonaute enzyme unveiled

The Argonaute (Ago) enzyme complex plays a critical role in DNA and RNA target cleavage for a process known as RNA silencing in prokaryotic and eukaryotic cells, making them a target for future gene-editing technology. The ...

Biotechnology Feb 21, 2019

Yeasts reach across tree of life to domesticate suite of bacterial genes

An insect's gut might seem an inhospitable place to settle in, but diverse microbes nonetheless make their home there. Yet in the gut, there's a struggle for the nutrients needed to survive among the resident bacteria and ...

Earth Sciences Feb 18, 2019

How the oldest evidence of movement could change what we know about life on Earth

In a suspension of disbelief, the countless readers who have picked up J.R.R. Tolkien's Lord of the Rings books have readily accepted that Ents, the ancient treelike creatures of the fictional Fangorn forest, walk, talk and ...

Biotechnology Jan 14, 2019

New method knocks out yeast genes with single-point precision

How do you make yeast work harder? Not to make bread, but in processes that yield chemicals and pharmaceuticals. Industries currently use a yeast called Saccharomyces cerevisiae. They'd like it to work better. The answer ...

Cell & Microbiology Jan 14, 2019

A new mechanism helps explain differences between eukaryotic and bacterial proteomes

Why do distinct species have different proteins? Is there a key that allows eukaryotic cells to produce proteins involved in multicellularity that are mostly absent in prokaryotes? These are some of the questions addressed ...

page 25 from 40