Your Query returns 9 Accession Numbers:

Query Term	Accession	NCBI Taxonid	Synonyms	Phenotype (OMIM) *
urk	BC050155	7955	mibp-pen
urk	NM_131693	7955	mibp-pen mibp
URK	BC013575	9606	UPA PLAU	191840
URK	NM_002658	9606	UPA PLAU	191840
urk	AE005048	64091	VNG1219G
urk	AE014972	210007
urk	AE004437	64091	VNG1219G
urk	NC_002607	64091
urk	NC_004350	210007

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

Text2Knowledge ... Yong Huang 2002