0	3	EBF	EBF	NNP
4	7	and	and	CC
8	11	E47	E47	NNP
12	23	collaborate	collaborate	VBP
24	26	to	to	TO
27	33	induce	induce	VB
34	44	expression	expression	NN
45	47	of	of	IN
48	51	the	the	DT
52	62	endogenous	endogenous	JJ
63	77	immunoglobulin	immunoglobulin	NN
78	87	surrogate	surrogate	JJ
88	93	light	light	JJ
94	99	chain	chain	NN
100	105	genes	gene	NNS
105	106	.	.	.

108	113	Early	early	JJ
114	115	B	B	NNP
116	120	cell	cell	NN
121	127	factor	factor	NN
128	129	(	(	(
129	132	EBF	EBF	NNP
132	133	)	)	)
134	137	and	and	CC
138	141	E47	E47	NNP
142	153	participate	participate	VBP
154	156	in	in	IN
157	160	the	the	DT
161	176	transcriptional	transcriptional	JJ
177	184	control	control	NN
185	187	of	of	IN
188	193	early	early	JJ
194	195	B	B	NNP
196	206	lymphocyte	lymphocyte	NN
207	222	differentiation	differentiation	NN
222	223	.	.	.

224	228	With	with	IN
229	232	the	the	DT
233	236	aim	aim	NN
237	239	of	of	IN
240	251	identifying	identify	VBG
252	259	genetic	genetic	JJ
260	267	targets	target	NNS
268	271	for	for	IN
272	277	these	these	DT
278	291	transcription	transcription	NN
292	299	factors	factor	NNS
299	300	,	,	,
301	303	we	we	PRP
304	310	stably	stably	RB
311	322	transfected	transfecte	VBD
323	328	cDNAs	cdna	NNS
329	337	encoding	encode	VBG
338	341	EBF	EBF	NNP
342	344	or	or	CC
345	346	a	a	DT
347	355	covalent	covalent	JJ
356	365	homodimer	homodimer	NN
366	368	of	of	IN
369	372	E47	E47	NNP
372	373	,	,	,
374	386	individually	individually	RB
387	389	or	or	CC
390	398	together	together	RB
398	399	,	,	,
400	404	into	into	IN
405	413	immature	immature	JJ
414	427	hematopoietic	hematopoietic	JJ
428	433	Ba/F3	ba/f3	NN
434	439	cells	cell	NNS
439	440	,	,	,
441	446	which	which	WDT
447	451	lack	lack	VBP
452	456	both	both	DT
457	464	factors	factor	NNS
464	465	.	.	.

466	468	In	in	IN
469	480	combination	combination	NN
480	481	,	,	,
482	485	EBF	EBF	NNP
486	489	and	and	CC
490	493	E47	E47	NNP
494	500	induce	induce	VBP
501	510	efficient	efficient	JJ
511	521	expression	expression	NN
522	524	of	of	IN
525	528	the	the	DT
529	539	endogenous	endogenous	JJ
540	554	immunoglobulin	immunoglobulin	NN
555	564	surrogate	surrogate	JJ
565	570	light	light	JJ
571	576	chain	chain	NN
577	582	genes	gene	NNS
582	583	,	,	,
584	591	lambda5	lambda5	NN
592	595	and	and	CC
596	601	VpreB	VpreB	NNP
601	602	,	,	,
603	610	whereas	whereas	IN
611	616	other	other	JJ
617	622	pre-B	pre-b	JJ
623	636	cell-specific	cell-specific	JJ
637	642	genes	gene	NNS
643	649	remain	remain	VBP
650	656	silent	silent	JJ
656	657	.	.	.

658	666	Multiple	multiple	JJ
667	679	functionally	functionally	RB
680	689	important	important	JJ
690	693	EBF	EBF	NNP
694	697	and	and	CC
698	701	E47	E47	NNP
702	709	binding	binding	NN
710	715	sites	site	NNS
716	720	were	be	VBD
721	731	identified	identify	VBN
732	734	in	in	IN
735	738	the	the	DT
739	746	lambda5	lambda5	NN
747	764	promoter/enhancer	promoter/enhancer	NN
765	771	region	region	NN
771	772	,	,	,
773	783	indicating	indicate	VBG
784	788	that	that	IN
789	796	lambda5	lambda5	NN
797	799	is	be	VBZ
800	801	a	a	DT
802	808	direct	direct	JJ
809	816	genetic	genetic	JJ
817	823	target	target	NN
824	827	for	for	IN
828	833	these	these	DT
834	847	transcription	transcription	NN
848	855	factors	factor	NNS
855	856	.	.	.

857	862	Taken	take	VBN
863	871	together	together	RB
871	872	,	,	,
873	878	these	these	DT
879	883	data	datum	NNS
884	891	suggest	suggest	VBP
892	896	that	that	IN
897	900	EBF	EBF	NNP
901	904	and	and	CC
905	908	E47	E47	NNP
909	918	synergize	synergize	VBP
919	921	to	to	TO
922	930	activate	activate	VB
931	941	expression	expression	NN
942	944	of	of	IN
945	946	a	a	DT
947	953	subset	subset	NN
954	956	of	of	IN
957	962	genes	gene	NNS
963	967	that	that	WDT
968	974	define	define	VBP
975	977	an	an	DT
978	983	early	early	JJ
984	989	stage	stage	NN
990	992	of	of	IN
993	996	the	the	DT
997	998	B	B	NNP
999	1003	cell	cell	NN
1004	1011	lineage	lineage	NN
1011	1012	.	.	.