Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
BT2.1BC0166619606BTF1    BTN2A1   
BT2.1NM_0070499606BTF1    BTN2A1   
BT2.1NM_0784769606BTF1    BTN2A1   
BT2.1U901429606
BT2.1AH0058649606
BT2.1U974959606
BT2.1U974969606
BT2.1U974979606

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

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Text2Knowledge ... Yong Huang 2002