Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
neurog1NM_1310417955ngn1    ngr1    cb260    zNgn1    neurod3    chunp6899    neurogenin   
Neurog1NM_01089610090AKA    ngn1    Math4C    Neurod3    neurogenin    601726
NEUROG1BC0086879606NEUROD3    AKA    Math4C    ngn1    601726
NEUROG1BC0282269606NEUROD3    AKA    Math4C    ngn1    601726
NEUROG1AY4033599606601726
NEUROG1AY4033609598
NEUROG1AY40336110090601726
NEUROG1NM_0061619606AKA    ngn1    Math4C    NEUROD3    601726
Neurog1NT_03958610090601726
neurog1BC0664277955neurod3    ngr1    cb260    zNgn1    chunp6899    neurogenin   
NEUROG1NT_0347729606601726
neurog1BC0565757955neurod3    ngr1    cb260    zNgn1    chunp6899    neurogenin   

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

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Text2Knowledge ... Yong Huang 2002