Two molecular control factors play a decisive role in what is known as splicing, the cutting and assembly of mature messenger ...

Genomics has provided an inventory of the catalytic subunits ... diverse array of mRNAs from a single pre-mRNA. Figure 3: Nuclear protein phosphatases in spliceosome assembly and catalysis.

helping to make sense of the fragmented messages stored in pre-mRNA. Most genes have many introns that belong to one class—the major introns—which are removed by the major spliceosome.