A 38,000-year old bone has yielded the world's first complete Neanderthal mitochondrial genome sequence, offering a tantalising glimpse at the genetic changes that separate humans from Neanderthals, which split some 600 millennia ago.
The mitochondrion – a structure often dubbed the cell's powerhouse – contains a mere 16,565 DNA letters that code for 13 proteins, whereas the nucleus holds more than 3 billion letters that produce more than 20,000 proteins. If DNA were to the size of a standard soccer pitch, then mitochondrial DNA (mtDNA) would be equivalent to a small flowerbed.
Thursday, August 07, 2008
First Neanderthal genome completed