Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Il-12bNM_00835210090p40    Il12p40    Il-12p40    Il12b   
IL-12BNM_0021879606CLMF    NKSF    CLMF2    NKSF2    IL12B   
IL-12BBC0675019606CLMF    NKSF2    CLMF2    NKSF    IL12B   
IL-12BBC0674989606CLMF    NKSF2    CLMF2    NKSF    IL12B   
IL-12BBC0674999606CLMF    NKSF2    CLMF2    NKSF    IL12B   
IL-12BBC0675009606CLMF    NKSF2    CLMF2    NKSF    IL12B   
IL-12BBC0675029606CLMF    NKSF2    CLMF2    NKSF    IL12B   
IL-12bU198359530
IL-12bU198429544

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

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Text2Knowledge ... Yong Huang 2002