Your Query returns 55 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
NOS2AJ2952308022iNOS   
NOS2AJ2952318022iNOS   
nos2NM_19406410090Nanos2    163730
NOS2NM_0006259606NOS    INOS    HEP-NOS    NOS2A    163730
NOS2NM_1532929606NOS    INOS    HEP-NOS    NOS2A    163730
NOS2X970138022
NOS2U850939986
NOS2AF3332489913
NOS2U850949986
Nos2NM_01092710090iNOS    Nos-2    NOS-II    163730
NOS2X857599606163730
NOS2X857609606163730
NOS2X857619606163730
NOS2X857629606163730
NOS2X857639606163730
NOS2X857649606163730
NOS2X857659606163730
NOS2X857669606163730
NOS2X857679606163730
NOS2X857689606163730
NOS2X857699606163730
NOS2X857709606163730
NOS2X857719606163730
NOS2X857729606163730
NOS2X857739606163730
NOS2X857749606163730
NOS2X857759606163730
NOS2X857769606163730
NOS2X857779606163730
NOS2X857789606163730
NOS2X857799606163730
NOS2X857809606163730
NOS2X857819606163730
NOS2U2668610116
Nos2XM_14714910090iNOS    NOS-II    163730
NOS2U6354910116
NOS2U4882910116
Nos2U8527010116
Nos2AF06591910090163730
Nos2AF06592010090163730
NOS2U2757210116
NOS2AF04208510116
Nos2AF06592110090163730
Nos2AF06592310090163730
nos2AB09597210090163730
nos2X9562910117
nos2NT_03939510090163730
Nos2AF06592210090163730
Nos2NT_03951510090163730
Nos2AY09056710090iNOS    163730
Nos2BC06237810090iNOS    NOS-II    163730
Nos2AY21153210116
NOS2AB1050768030
NOS2X976037957
Nos2NM_01261110116iNos    Nos2a   

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

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Text2Knowledge ... Yong Huang 2002