Human Gene Structure, Expression, Control, and Function

From WikiGenetics

The gene is composed of coding regions called exons and non-coding regions called introns. When transcribed to mRNA the combination of introns and exons make up a primary transcript. The primary transcript consists of precursor mRNA also known as pmRNA. Before translation can begin the intron sequences must be removed from the pmRNA to make mRNA. This process is known as RNA splicing and is accomplished by the splicesome.

[edit] Spliceosomes

The spliceosome consists of RNA-protein complexes called small nuclear ribonucleoproteins or snRPS and pmRNA and various other proteins.