Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
PPAR-betaNM_01114510090NUC1    NUC-1    Nr1c2    Pparb    PPAR[b]    Pparb/d    PPAR-delta    Ppard   
PPAR-betaBC0075789606NUC1    NUCI    FAAR    NR1C2    NUCII    MGC3931    PPARB    PPARD   
PPAR-betaBC0027159606NUC1    NUCI    FAAR    NR1C2    NUCII    MGC3931    PPARB    PPARD   
PPAR-betaNM_0062389606FAAR    NUC1    NUCI    NR1C2    NUCII    PPARB    MGC3931    PPARD   
PPAR-betaNM_1774359606FAAR    NUC1    NUCI    NR1C2    NUCII    PPARB    MGC3931    PPARD   
PPAR-betaAF0132659986

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

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Text2Knowledge ... Yong Huang 2002