Your Query returns 8 Accession Numbers:

Query Term	Accession	NCBI Taxonid	Synonyms	Phenotype (OMIM) *
BCL9	AJ416470	9823
BCL9	AJ416471	9823
BCL9	Y13620	9606		602597
BCL9	NM_004326	9606	LGS	602597
Bcl9	XM_358351	10090		602597
Bcl9	NT_078387	10090		602597
Bcl9	BC019641	10090		602597
BCL9	NT_034400	9606		602597

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

Text2Knowledge ... Yong Huang 2002