Several methods of RNA splicing occur in nature the type of splicing depends on the structure of the spliced intron and the catalysts required for splicing to occur.
There exist self-splicing introns, that is, ribozymes that can catalyze their own excision from their parent RNA molecule. For many eukaryotic introns, splicing occurs in a series of reactions which are catalyzed by the spliceosome, a complex of small nuclear ribonucleoproteins ( snRNPs). For those eukaryotic genes that contain introns, splicing is usually needed to create an mRNA molecule that can be translated into protein. For nuclear-encoded genes, splicing occurs in the nucleus either during or immediately after transcription. It works by removing introns (non-coding regions of RNA) and so joining together exons (coding regions). RNA splicing is a process in molecular biology where a newly-made precursor messenger RNA (pre- mRNA) transcript is transformed into a mature messenger RNA ( mRNA).
( December 2016) ( Learn how and when to remove this template message) Please help improve it to make it understandable to non-experts, without removing the technical details. This article may be too technical for most readers to understand.