Nov 2, 2011, 12:10 AM | Newsletter
The most common form of heritable cognitive impairment is Fragile X Syndrome, caused by mutation or malfunction of the FMR1 gene. Loss of FMR1 function is also the most common genetic cause of autism.
In 2009, the DNA alphabet expanded. Scientists discovered that an extra letter or “sixth nucleotide” was surprisingly abundant in DNA from stem cells and brain cells.Now, researchers at Emory University School of Medicine have mapped the patterns formed by that letter in the brains of mice, observing how its pattern of distribution in the genome changes during development and aging.