U1 SMALL NUCLEAR RIBONUCLEOPROTEIN A/U2 SMALL NUCLEAR RIBONUCLEOPROTEIN B
u1 small nuclear ribonucleoprotein a/u2 small nuclear ribonucleoprotein b
U1 SMALL NUCLEAR RIBONUCLEOPROTEIN A/U2 SMALL NUCLEAR RIBONUCLEOPROTEIN B
u1 small nuclear ribonucleoprotein a/u2 small nuclear ribonucleoprotein b