1b). Within this complex, intron excision occurs in two steps, each a single transesterification reaction. In the first step, the 2'-OH of an adenosine in the intron (the branch site A ...

Scientists have discovered that some tiny segments of RNA thought to be junk instead have a functional role in suppressing production of certain messenger RNAs and appear to help cells respond to ...

In human cells, only a small proportion of the information written in genes is used to produce proteins. How does the cell select this information? A large molecular machine called the spliceosome ...