Your Query returns 9 Accession Numbers:

Query Term	Accession	NCBI Taxonid	Synonyms	Phenotype (OMIM) *
Plag1	NM_019969	10090		603026
PLAG1	AY420150	9606		603026
PLAG1	AY420151	9598
PLAG1	AY420152	10090		603026
Plag1	NT_039258	10090		603026
Plag1	AF057366	10090	pleiomorphic adenoma gene 1	603026
PLAG1	NM_002655	9606	PSA SGPA	603026
PLAG1	NT_008183	9606		603026
Plag1	AY574219	10090		603026

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

Text2Knowledge ... Yong Huang 2002