Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
C21orf11BC0578299606PRED44    2-21    ORF9    C21orf76    FAM3B   
C21orf11NM_05818696062-21    ORF9    PRED44    C21orf76    FAM3B   
C21orf11NM_20696496062-21    ORF9    PRED44    C21orf76    FAM3B   
C21orf11AL1632859606
C21orf11AF3759899606
C21orf11AY0400869606
C21orf11AF36035810090

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

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Text2Knowledge ... Yong Huang 2002