Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
PD-1NM_00879810090Pdc1    Ly101    Pdcd1   
PD-1L274409606
PD-1U648649606
PD-1X6791410090

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

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Text2Knowledge ... Yong Huang 2002