Your Query returns 6 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Serpina1bNM_00924410090PI2    Spi1-2    D12Ucla2   
Serpina1bNT_03955210090
Serpina1bBC01287410090PI2   
Serpina1bBC02210910090PI2   
Serpina1bBC04925510090PI2   
Serpina1bBC02544510090PI2   

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

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Text2Knowledge ... Yong Huang 2002