Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Rpms12NM_01188510090rps12    Mrps12   
RPMS12BC0074999606RPSM12    MT-RPS12    MPR-S12    RPS12    MRPS12   
RPMS12BC0016179606RPSM12    MT-RPS12    MPR-S12    RPS12    MRPS12   
RPMS12NM_0211079606RPS12    RPSM12    MPR-S12    MT-RPS12    MRPS12   
RPMS12NM_0333639606RPS12    RPSM12    MPR-S12    MT-RPS12    MRPS12   
RPMS12NM_0333629606RPS12    RPSM12    MPR-S12    MT-RPS12    MRPS12   
RPMS12BC0064249606RPSM12    MT-RPS12    MPR-S12    RPS12    MRPS12   
RPMS12AF0587619606

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

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Text2Knowledge ... Yong Huang 2002