Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CD121bNM_01055510090Il1r-2    Il1r2   
CD121bNM_00836210090CD121a    Il1r-1    Il1r1   
CD121bBC03296210090Il1r2   

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

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Text2Knowledge ... Yong Huang 2002