SR proteins are a family of proteins that play a crucial role in the process of RNA splicing. They are characterized by their serine-arginine-rich domains, which help them bind to pre-mRNA and facilitate the removal of introns. This process is essential for producing mature messenger RNA (mRNA) that can be translated into proteins. In addition to splicing, SR proteins are involved in other aspects of RNA metabolism, including RNA transport and translation. They help regulate gene expression by influencing how RNA is processed and utilized within the cell. Their proper function is vital for maintaining cellular health and normal biological processes.