Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
S21AF301180212142
S21AY45411952874
S21BX572605258594rpsU   
S21BX572606258594rpsU   
S21NC_005296258594rpsU   
S21NC_005296258594rpsU   
S21AB0944943750
S21X671253562
S21X7905910116

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

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Text2Knowledge ... Yong Huang 2002