Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Serpinb2NM_01111110090PAI-2    Planh2    ovalbumin    173390
SERPINB2BC0126099606PAI2    PLANH2    PAI    173390
SERPINB2AY4163139606173390
SERPINB2AY4163149598
SERPINB2AY41631510090173390
SERPINB2NM_0025759606PAI    PAI2    PLANH2    HsT1201    173390
Serpinb2NT_03917410090173390
SERPINB2NT_0250289606173390

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

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Text2Knowledge ... Yong Huang 2002