Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MTXBC0019069606MTXN    MTX1   
MTXNM_0024559606MTXN    MTX1   
MTXNM_1988839606MTXN    MTX1   
MtxBC02307110090Mtx1   
mtxAY234327226212dhfr   
MtxNM_01360410090Gcap6    Mtx1   
MTXU469209606
MtxAF05927710090

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

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Text2Knowledge ... Yong Huang 2002