Your Query returns 18 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
PTX3BC0116429606MGC12766    PITX3    602492
PTX3NM_0050299606MGC12766    PITX3    602492
Ptx3NM_00885210090ak    Pitx3    602492
Ptx3NM_00898710090TSG-14    602492
Ptx3XM_22722310116
Ptx3NW_04762510116
PTX3BC0397339606TSG-14    602492
PTX3AY4131339606602492
PTX3AY4131349598
PTX3AY41313510090602492
PTX3X977489606602492
PTX3X636139606602492
PTX3NM_0028529606TSG-14    602492
Ptx3NT_03923410090602492
ptx3AJ01100510116
ptx3X8360110090602492
Ptx3BC02217610090TSG-14    602492
PTX3NT_0056129606602492

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

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Text2Knowledge ... Yong Huang 2002