Your Query returns 4 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ZYMEBC0205469606BMP2B    BMP2B1    BMP4    602652
ZYMENM_0012029606BMP2B    BMP2B1    BMP4    602652
ZYMENM_1308509606BMP2B    BMP2B1    BMP4    602652
ZYMENM_1308519606BMP2B    BMP2B1    BMP4    602652

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

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Text2Knowledge ... Yong Huang 2002