>3UCU_1|Chain A[auth P]|U1 small nuclear ribonucleoprotein A|Homo sapiens (9606) MAVPETRPNHTIYINNLNEKIKKDELKKSLHAIFSRFGQILDILVSRSLKMRGQAFVIFKEVSSATNALRSMQGFPFYDKPMRIQYAKTDSDIIAKMK >3UCU_2|Chain B[auth R]|RNA (92-MER)|null GGUCACGCACAGGGCAAACCAUUCGAAAGAGUGGGACGCAAAGCCUCCGGCCUAAACCAUUGCACUCCGGUAGGUAGCGGGGUUACCGAUGG >3UCU_3|Chain C[auth A]|diguanosine monophosphate| GG