Your Query returns 42 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
nifNAP003585103690
nifNU47055103690
nifNAE000102394
nifNAF11936147227
nifNAF00370041431
nifNAJ313205316
nifNAP005941224911
nifNAF03041433996
nifNAF361867192
nifNU7588739152
nifNAE007238382SMa0873   
nifNX56894375
nifNX99694549
nifNAL672114381
NifNX174331061
nifNX87971145262
nifNAE011102188937MA3901   
nifNAE012909194439CT1539   
nifNAF167539119677
nifNAF1675401164
nifNAF16754192938
nifNAF167542122326
nifNAF16754344472
nifNAF1675441178
nifNAF1675451184
nifNAF16754834078
nifNAY0292342209
nifNAF088132964
nifNU8092829449RESP0119F. RetliDB:RE1SP0000119   
nifNAH010242375
nifNAF322012375
nifNNC_000914394
nifNNC_003272103690
nifNNC_004463224911
nifNNC_003552188937
nifNNC_00404129449RESP0119F. RetliDB:RE1SP0000119   
nifNNC_002932194439CT1539   
nifNBX572607258594
nifNBX95722139152
nifNNC_005296258594
nifNNC_003037266834
nifN0N/A

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

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Text2Knowledge ... Yong Huang 2002