Your Query returns 43 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Cyp21NM_0099951009021OH    21-OH    21OHA    Oh21-1    CYP21OH-A    Cyp21a1    201910
CYP21NM_0005009606CAH1    CPS1    CA21H    CYP21B    P450c21B    CYP21A2    201910
CYP21NT_0075929606CAH1    CPS1    CA21H    CYP21B    P450c21B    CYP21A2    201910
Cyp21NM_0571011011621-OH    Cyp21a1   
CYP21NG_0000139606CAH1    CPS1    CA21H    CYP21B    P450c21B    CYP21A2    201910
cyp21AP005041227882
CYP21M839399823
CYP21AH0026559606201910
CYP21M310229606201910
CYP21M232249606201910
CYP21M215449606201910
CYP21M215459606201910
CYP21M310239606201910
CYP21M232259606201910
CYP21M215479606201910
CYP21M215489606201910
CYP21M215499606201910
CYP21M215509606201910
CYP21M268569606201910
CYP21M285489606201910
CYP21K027719606201910
CYP21M172529606201910
CYP21M197119606201910
CYP21AJ4312129606201910
CYP21X588989606201910
CYP21X588999606201910
CYP21X589009606201910
CYP21X589049606201910
CYP21X589069606201910
CYP21X589079606201910
CYP21X589029606201910
CYP21X719379606201910
CYP21AF0779749606201910
CYP21AH0052829606201910
CYP21M127929606201910
Cyp21M7382010090201910
Cyp21M6493310090201910
Cyp21AB01026610090201910
Cyp21AB01562310090201910
Cyp21AY09178910116
Cyp21AY09179010116
CYP21AB0951117937
cyp21NC_003155227882

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

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Text2Knowledge ... Yong Huang 2002