Your Query returns 21 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ELK1NM_0122859606BEC2    Kv12.3    KCNH4    311040
ELK1NM_1446339606ELK    Kv12.1    KCNH8    311040
ELK1BC02969010090ELK3    ELK    Kv12.1    Kcnh8    311040
ELK1M252699606311040
Elk1AB0161939606311040
elk1AB0161949606311040
Elk1NM_00792210090311040
ELK1NW_04781310116
ELK1NM_14509510116
ELK1BC0561509606311040
ELK1AH0070349606311040
ELK1AF0806159606311040
ELK1AF0806169606311040
ELK1AL0091729606311040
ELK1NM_0052299606311040
elk1AF06195710116
elk1AJ00762810116
Elk1NT_03970010090311040
elk1X8725710090311040
Elk1BC05447410090Elk-1    311040
ELK1NT_0115689606311040

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

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Text2Knowledge ... Yong Huang 2002