Your Query returns 11 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mdr2NM_00883010090Pgy2    Pgy-2    mdr-2    Abcb4   
mdr2L133815833
mdr2AY2967485833
mdr2AY2967495833
mdr2U629355085
mdr2U629365085
mdr2AJ53506939947
MDR2AF312677199306
mdr2M7415110090
mdr2U3769410116
mdr2U4683910090

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

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Text2Knowledge ... Yong Huang 2002