Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
alpha-PS1NC_0043547227PS1    aPS1    CG1771    PS1alpha    alphaPS1    l(1)G0429    l(1)G0443    mew   
alpha-PS1NM_0785907227PS1    aPS1    CG1771    PS1alpha    alphaPS1    l(1)G0429    l(1)G0443    mew   
alpha-PS1NM_1673547227PS1    aPS1    CG1771    PS1alpha    alphaPS1    l(1)G0429    l(1)G0443    mew   
alpha-PS1X739757227

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

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Text2Knowledge ... Yong Huang 2002