Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
K-RAS4BNM_0333609606KRAS    RASK2    KI-RAS    C-K-RAS    K-RAS2A    K-RAS2B    K-RAS4A    KRAS2   
K-RAS4BNM_0049859606KRAS    RASK2    KI-RAS    C-K-RAS    K-RAS2A    K-RAS2B    K-RAS4A    KRAS2   

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

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Text2Knowledge ... Yong Huang 2002