Background：The protein encoded by this gene associates with stem loop IV of U2 small nuclear ribonucleoprotein （U2 snRNP） in the presence of snRNP-A'. The encoded protein may play a role in pre-mRNA splicing. Autoantibodies from patients with systemic lupus erythematosus frequently recognize epitopes on the encoded protein. Two transcript variants encoding the same protein have been found for this gene.
