Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Rnu1a-1BC00322910090U1A    Rnu1a1    Snrpa   
Rnu1a-1NM_01578210090U1A    Rnu1a1    Snrpa   
Rnu1a-1L1544710090

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

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Text2Knowledge ... Yong Huang 2002