Meet Morpheus

日期:2019-03-07 08:11:04 作者:郁穆 阅读:

By Andy Coghlan THEORIES about how nature “silences” genes have been challenged by the discovery of a so-called Morpheus molecule. Named after the Greek god of sleep and dreams, the molecule appears to be as important for sedating genes in plants as methylation—the chemical process that was thought to be nature’s principal gene sedative. Silencing ensures that certain genes aren’t expressed. With methylation, enzymes add chemical units called methyl groups to specific genes. This was thought to keep them quiet until the methyl groups were stripped off. But while doing experiments on thale cress (Arabidopsis thaliana), Jerzy Paszkowski,