Life's first letters

时间:2019-03-07 05:12:02166网络整理admin

PRIMORDIAL soup made of RNA is back on the menu for the origins of life. Researchers at the Whitehead Institute for Biomedical Research in Cambridge, Massachusetts, have shown that enzymes made of RNA—DNA’s chemical cousin—can make accurate copies of other RNA molecules. Molecular replication is crucial to the existence of life, but nobody knows how it began. Now David Bartel and his colleagues at the Whitehead Institute have found a ribozyme that can add up to 14 bases to an RNA template. However, the ribozyme could only produce short chains. Bartel suggests RNA wasn’t the beginning of life,