What is the name of the complex that processes pre-mRNA by removing introns?

The spliceosome is a critical complex in the process of gene expression, especially during the maturation of pre-mRNA. This multi-protein complex is responsible for the removal of introns—non-coding sequences that interrupt the coding regions (exons) of genes. During the splicing process, the spliceosome recognizes specific sequences at the intron-exon boundaries and catalyzes the removal of introns, thereby joining the exons together to form the final mRNA transcript.

This mature mRNA can then be translated into protein, which is essential for the proper function of cells. The mechanism of splicing is vital for creating diverse protein isoforms and allows for increased variability in gene expression. By processing pre-mRNA through splicing, the spliceosome ensures that only the necessary coding regions are expressed, making it a crucial player in post-transcriptional regulation.