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Friday, January 2, 2015

ScienceDaily: Top Environment News

ScienceDaily: Top Environment News

Killing for DNA: A predatory device in the cholera bacterium

Posted: 01 Jan 2015 01:36 PM PST

Scientists have uncovered the unconventional way that the cholera bacterium stabs and kills other bacteria to steal their DNA, making it potentially more virulent. Cholera is caused when the bacterium Vibrio cholerae infects the small intestine. The disease is characterized by acute watery diarrhea resulting in severe dehydration.

Defying textbook science, study finds new role for proteins

Posted: 01 Jan 2015 11:23 AM PST

Results from a new study defy textbook science, showing for the first time that the building blocks of a protein, called amino acids, can be assembled without blueprints – DNA and an intermediate template called messenger RNA (mRNA). A team of researchers has observed a case in which another protein specifies which amino acids are added.

Unique Sulawesi frog gives birth to tadpoles

Posted: 31 Dec 2014 12:39 PM PST

Frogs exhibit an amazing variety of reproductive behaviors, ranging from brooding their eggs in their mouths to carrying tadpoles on their backs. Fewer than a dozen species of 6,000+ worldwide have developed internal fertilization, and some of these give birth to froglets instead of eggs. One species that has internal fertilization, a fanged frog from the island of Sulawesi in Indonesia, has been observed to give direct birth to tadpoles, which is unique among amphibians.

Patterns of RNA regulation in nuclei of plants identified

Posted: 31 Dec 2014 11:04 AM PST

In a new study done in plants, biologists give a global view of the patterns that can affect the various RNA regulatory processes that occur before these molecules move into the cytoplasm, where they are translated into the proteins that make up a living organism.

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