Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
L12aNG_0008349606V1    L12    IGKV15    IGKV1-5   
L12aNT_0221849606V1    L12    IGKV15    IGKV1-5   
L12aAJ3999029606
L12aAJ3999039606
L12aAJ3999399606
L12aAJ3999499606

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

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Text2Knowledge ... Yong Huang 2002