Your Query returns 19 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HDAC1NM_1396617227HDAC    RPD3    dRPD3    CG7471    HDAC-1    dHDAC1    DmHDAC1    dHDAC-1    dmHDA401    l(3)64Cc    Rpd3/HDAC    l(3)04556    Su(var)326    Su(var)328   
HDAC1NT_0374367227HDAC    RPD3    dRPD3    CG7471    HDAC-1    dHDAC1    DmHDAC1    dHDAC-1    dmHDA401    l(3)64Cc    Rpd3/HDAC    l(3)04556    Su(var)326    Su(var)328   
hdac1AF5062017955
HDAC1AF0329197668
HDAC1AF09132636329
HDAC1AY5049489913
hdac1NM_1732367955fi06f03    chunp6919    wu:fi06f03   
Hdac1NM_00822810090HD1    RPD3    601241
Hdac1XM_34606510116
Hdac1NW_04781610116
HDAC1BC0003019606HD1    RPD3L1    RPD3    601241
HDAC1AY4209009606601241
HDAC1AY4209019598
HDAC1AY42090210090601241
HDAC1NM_0049649606HD1    RPD3    RPD3L1    601241
Hdac1NT_03926510090601241
HdaC1AF32112910116
HDAC1AF0441699031
HDAC1NT_0045119606601241

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

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Text2Knowledge ... Yong Huang 2002