SR Proteins are a family of proteins that play a crucial role in the process of gene expression, particularly in the splicing of pre-mRNA. They are characterized by their serine-arginine-rich domains, which help them bind to RNA and interact with other proteins involved in the splicing machinery. These proteins are essential for the proper processing of messenger RNA (mRNA), ensuring that the final mRNA product is correctly formed and functional. Abnormalities in SR Protein function can lead to various diseases, including certain types of cancer and genetic disorders, highlighting their importance in cellular processes.