U4 snRNA

U4 snRNA (small nuclear RNA) is a small molecule found in cells that helps in the process of splicing, which is how cells edit certain RNA molecules to make them functional. U4 binds with other snRNAs, like U6 and U5, to form a complex that accurately removes non-coding parts (introns) from precursor messenger RNA (pre-mRNA). This editing is essential for producing mature mRNA, which carries genetic instructions for making proteins. U4’s role is to ensure the splicing process occurs correctly, maintaining proper gene expression and cell function.