Your Query returns 14 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mrps12NM_01188510090rps12    Rpms12    603021
MRPS12BC0074999606RPMS12    RPSM12    MT-RPS12    MPR-S12    RPS12    603021
MRPS12BC0016179606RPMS12    RPSM12    MT-RPS12    MPR-S12    RPS12    603021
MRPS12AY4005969606603021
MRPS12AY4005979598
MRPS12AY40059810090603021
MRPS12NM_0211079606RPS12    RPMS12    RPSM12    MPR-S12    MT-RPS12    603021
MRPS12NM_0333639606RPS12    RPMS12    RPSM12    MPR-S12    MT-RPS12    603021
MRPS12NM_0333629606RPS12    RPMS12    RPSM12    MPR-S12    MT-RPS12    603021
Mrps12NT_03941310090603021
Mrps12BC01267910090rps12    603021
Mrps12BC02752210090rps12    603021
MRPS12NT_0111099606603021
MRPS12BC0064249606RPMS12    RPSM12    MT-RPS12    MPR-S12    RPS12    603021

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

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Text2Knowledge ... Yong Huang 2002