Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
FMRPNM_00803110090Fmr-1    Fmr1   
FMRPBC0389989606FRAXA    FMR1   
FMRPNM_0020249606FRAXA    FMR1   
FMRPNM_05280410116Fmr1   

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

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Text2Knowledge ... Yong Huang 2002