Your Query returns 14 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Serpine1NM_00887110090PAI1    PAI-1    Planh1    173360
Serpine1NW_04737010116
SERPINE1BC0108609606PAI-1    PAI1    PLANH1    PAI    173360
SERPINE1AF3864929606173360
SERPINE1AY4029819606173360
SERPINE1AY4029829598
SERPINE1AY40298310090173360
SERPINE1NM_0006029606PAI    PAI1    PAI-1    PLANH1    173360
SERPINE1NM_1741379913PAI1   
Serpine1NT_08052610090173360
Serpine1BC05409110090PAI-1    PAI1    173360
SERPINE1NT_0079339606173360
SERPINE1NT_0795969606173360
Serpine1NM_01262010116Pai1    PAI1A    Planh    Pai1aa    RATPAI1A   

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

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Text2Knowledge ... Yong Huang 2002