Quantcast
Last updated on April 23, 2014 at 1:22 EDT

Latest Gustavo Caetano-Anollés Stories

2012-09-13 13:32:52

A new study of giant viruses supports the idea that viruses are ancient living organisms and not inanimate molecular remnants run amok, as some scientists have argued. The study reshapes the universal family tree, adding a fourth major branch to the three that most scientists agree represent the fundamental domains of life. The new findings appear in the journal BMC Evolutionary Biology. The researchers used a relatively new method to peer into the distant past. Rather than comparing...

41367_web
2012-03-14 11:08:41

In the beginning — of the ribosome, the cell's protein-building workbench — there were ribonucleic acids, the molecules we call RNA that today perform a host of vital functions in cells. And according to a new analysis, even before the ribosome's many working parts were recruited for protein synthesis, proteins also were on the scene and interacting with RNA. This finding challenges a long-held hypothesis about the early evolution of life. The study appears in the journal PLoS...

2012-03-12 20:00:01

In the beginning — of the ribosome, the cell's protein-building workbench — there were ribonucleic acids, the molecules we call RNA that today perform a host of vital functions in cells. And according to a new analysis, even before the ribosome's many working parts were recruited for protein synthesis, proteins also were on the scene and interacting with RNA. This finding challenges a long-held hypothesis about the early evolution of life. The "RNA world" hypothesis, first...

Molecular 'Culprit' Linked To Rise Of Planetary Oxygen
2012-01-11 04:34:18

A turning point in the history of life occurred 2 to 3 billion years ago with the unprecedented appearance and dramatic rise of molecular oxygen. Now researchers report they have identified an enzyme that was the first — or among the first — to generate molecular oxygen on Earth. The new findings, reported in the journal Structure, build on more than a dozen previous studies that aim to track the molecular evolution of life by looking for evidence of that history in present-day...