Your Query returns 11 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Serpina1NW_04776210116
SERPINA1BC0119919606AAT    PI    PI1    A1AT    A1A    alpha-1-antitrypsin   
SERPINA1BC0156429606AAT    PI    PI1    A1AT    A1A    alpha-1-antitrypsin   
SERPINA1AY4103559606
SERPINA1AY4103569598
SERPINA1AY41035710090
SERPINA1NM_1738829913PI   
Serpina1NM_02251910116Pi    AAT    Spi1   
SERPINA1NT_0264379606
serpina1BC0628697955wu:fb71a09    fb71a09    wu:fb61c07    fb61c07   
SERPINA1NM_0002959606PI    A1A    AAT    PI1    A1AT   

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

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Text2Knowledge ... Yong Huang 2002