Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Prrx2NM_00911610090S8    Prx2    604675
Prrx2XM_23832710116
Prrx2NW_04765210116
PRRX2BC0146459606PMX2    604675
PRRX2NM_0163079606PMX2    PRX2    MGC19843    604675
Prrx2XM_14909610090Prx2    604675
Prrx2NT_03920610090604675
PRRX2NT_0084709606604675

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

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Text2Knowledge ... Yong Huang 2002