Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Bmpr2NM_00756110090BMP-2    BMPR-II    600799
BMPR2BC0529859606BMPR-II    BMPR3    BRK-3    PPH1    BMR2    T-ALK    600799
BMPR2AY4055649606600799
BMPR2AY4055659598
BMPR2AY40556610090600799
BMPR2NM_0012049606BMR2    PPH1    BMPR3    BRK-3    T-ALK    BMPR-II    600799
BMPR2NM_0333469606BMR2    PPH1    BMPR3    BRK-3    T-ALK    BMPR-II    600799
Bmpr2NT_03917010090600799
BMPR2NT_0054039606600799

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

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Text2Knowledge ... Yong Huang 2002