nucleic acid binding | identical protein binding | organic cyclic compound binding | protein binding | heterocyclic compound binding | RNA binding
intracellular membrane-bounded organelle | U1 snRNP | small nuclear ribonucleoprotein complex | cell | nuclear lumen | spliceosomal snRNP complex | intracellular organelle | protein-containing complex | nucleoplasm | ribonucleoprotein complex | spliceosomal complex | membrane-bounded organelle | nucleus | organelle | membrane-enclosed lumen | intracellular