Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HB2NM_0330339606Hb-2    KRTHB2   
HB2NM_0003359606HB1    HH1    IVF    LQT3    Nav1.5    SCN5A   
HB2NM_1980569606HB1    HH1    IVF    LQT3    Nav1.5    SCN5A   
HB2AF14488937621
hb2AJ5485017719
hb2AJ13303583558
hb2U7602839946
HB2AJ01081147664
hb2Y185794224
hb2AJ31205434245
hb2AF33550339947
HB2AY479969118781

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

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Text2Knowledge ... Yong Huang 2002