Your Query returns 19 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
SNRPBAH00817513616
SNRPBAF13483313616
SNRPBAF13483413616
SNRPBJ045649606
SnrpbNM_00922510090SMB    SM-B    SM11    SNRNP-B   
SNRPBAY4188759606
SNRPBAY4188769598
SNRPBAY41887710090
SNRPBAL0496509606
SNRPBAH0081749606
SNRPBAF1348229606
SNRPBAF1348239606
SNRPBAF1348249606
SNRPBAF1348259606
SNRPBNM_0030919606COD    SNRPB1    snRNP-B    SmB/SmB'   
SNRPBNM_1982169606COD    SNRPB1    snRNP-B    SmB/SmB'   
SnrpbNT_07834710090
SNRPBNT_0113879606
SNRPBBC0035309606SNRPB1    COD    SmB/SmB'    snRNP-B   

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002