Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ghHkb1BC0064529606HB1    MLN137    hHAKB2-1    Hb-1    KRTHB1   
ghHkb1BC0212419606HB1    MLN137    hHAKB2-1    Hb-1    KRTHB1   
ghHkb1NM_0022819606HB1    Hb-1    MLN137    hHAKB2-1    KRTHB1   
ghHKb1Y136219606
GHHKB1G642529606

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

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Text2Knowledge ... Yong Huang 2002