Your Query returns 33 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
nifXAP003585103690
nifXU47055103690
nifXAE000102394
nifXL292991859
nifXAF11936147227
nifXAF00370041431
nifXAP005941224911
nifXAF03041433996
nifXAF361867192
nifXU7588739152
nifXAE007236382SMa0831   
nifXX99694549
nifXAL672114381
NifXX174331061
nifXX87971145262
NIFXBX571660844
nifXAF16753857878
nifXAF088132964
nifXU8092829449RESP0120F. RetliDB:RE1SP0000120   
nifXAE017217243231
nifXAH010242375
nifXAF322012375
nifXNC_000914394
nifXNC_003272103690
nifXNC_004463224911
nifXNC_00404129449RESP0120F. RetliDB:RE1SP0000120   
NIFXNC_005090844
nifXNC_002939243231
nifXBX572607258594
nifXBX95722139152
nifXNC_005296258594
nifXNC_003037266834
nifX0N/A

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

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Text2Knowledge ... Yong Huang 2002