Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MGC5277BC0001759606HPS    HPS1   
MGC5277NM_0001959606HPS    HPS1   
MGC5277NM_1826379606HPS    HPS1   
MGC5277NM_1826389606HPS    HPS1   
MGC5277NM_1826399606HPS    HPS1   

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

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Text2Knowledge ... Yong Huang 2002