Your Query returns 10 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hmga2NM_01044110090pg    Hmgic    pygmy    HMGI-C    9430083A20Rik    600698
Hmga2NM_17805710090pg    Hmgic    pygmy    HMGI-C    9430083A20Rik    600698
HMGA2AF5336519606HMGIC    600698
HMGA2AF5336529606HMGIC    600698
HMGA2AF5336539606HMGIC    600698
HMGA2AF5336549606HMGIC    600698
HMGA2NM_0034839606BABL    LIPO    HMGIC    600698
Hmga2NT_03950110090600698
Hmga2BC05215810090HMGI-C    pygmy    9430083A20Rik    600698
HMGA2NT_0294199606600698

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

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Text2Knowledge ... Yong Huang 2002