The bacterium that causes typhoid fever sickens about 21 million people annually but not other mammals. Researchers at Yale and the University of California-San Diego have discovered an explanation: differences in a single oxygen atom in the human...
MicroRNAs may be tiny — as few as 20 genetic letters, compared to 3 billion in the DNA of a human — but they play a major role in biology, helping to determine which genes are expressed or silenced. In the last 10 years, researchers at Yale and elsewhere...
Bacteria in colonies don’t reproduce sexually and are genetically identical, yet they can prepare in advance for changing environmental conditions.Yale University researchers have shown that bacteria carry out this sophisticated strategy by producing...