Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Flk-1NM_01061210090Flk1    Ly73    Krd-1    VEGFR2    VEGFR-2    6130401C07    Kdr   
flk-1NM_1314727955flk    flk1    vegr2    VEGFR-2    fk52c05    wu:fk52c05    kdr   
flk-1X942989913
flk-1AJ2454469823
Flk-1X7084210090
Flk-1X5939710090
flk-1AF0077608355
flk-1S78345131086
flk-1U759957955

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

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Text2Knowledge ... Yong Huang 2002