0	10	Activation	Activation	NNP
11	13	of	of	IN
14	18	Stat	Stat	NNP
19	21	5b	5b	NN
22	24	in	in	IN
25	34	erythroid	erythroid	JJ
35	46	progenitors	progenitor	NNS
47	57	correlates	correlate	VBZ
58	62	with	with	IN
63	66	the	the	DT
67	74	ability	ability	NN
75	77	of	of	IN
78	82	ErbB	ErbB	NNP
83	85	to	to	TO
86	92	induce	induce	VB
93	102	sustained	sustained	JJ
103	107	cell	cell	NN
108	121	proliferation	proliferation	NN
121	122	.	.	.

124	128	Self	self	NN
129	136	renewal	renewal	NN
137	139	of	of	IN
140	146	normal	normal	JJ
147	156	erythroid	erythroid	JJ
157	168	progenitors	progenitor	NNS
169	171	is	be	VBZ
172	179	induced	induce	VBN
180	182	by	by	IN
183	186	the	the	DT
187	195	receptor	receptor	NN
196	204	tyrosine	tyrosine	NN
205	211	kinase	kinase	NNP
212	218	c-ErbB	c-ErbB	NNP
218	219	,	,	,
220	227	whereas	whereas	IN
228	233	other	other	JJ
234	243	receptors	receptor	NNS
244	245	(	(	(
245	256	c-Kit/Epo-R	c-Kit/Epo-R	NNP
256	257	)	)	)
258	266	regulate	regulate	VBP
267	276	erythroid	erythroid	JJ
277	292	differentiation	differentiation	NN
292	293	.	.	.

294	296	To	to	TO
297	304	address	address	VB
305	313	possible	possible	JJ
314	324	mechanisms	mechanism	NNS
325	329	that	that	WDT
330	335	could	could	MD
336	343	explain	explain	VB
344	348	this	this	DT
349	358	selective	selective	JJ
359	367	activity	activity	NN
368	370	of	of	IN
371	377	c-ErbB	c-ErbB	NNP
377	378	,	,	,
379	381	we	we	PRP
382	390	analyzed	analyze	VBD
391	394	the	the	DT
395	402	ability	ability	NN
403	405	of	of	IN
406	411	these	these	DT
412	421	receptors	receptor	NNS
422	424	to	to	TO
425	433	activate	activate	VB
434	437	the	the	DT
438	447	different	different	JJ
448	455	members	member	NNS
456	458	of	of	IN
459	462	the	the	DT
463	467	Stat	Stat	NNP
468	481	transcription	transcription	NN
482	488	factor	factor	NN
489	495	family	family	NN
495	496	.	.	.

497	503	Ligand	Ligand	NNP
504	514	activation	activation	NN
515	517	of	of	IN
518	524	c-ErbB	c-ErbB	NNP
525	532	induced	induce	VBD
533	536	the	the	DT
537	545	tyrosine	tyrosine	NN
546	561	phosphorylation	phosphorylation	NN
561	562	,	,	,
563	574	DNA-binding	dna-binding	NN
574	575	,	,	,
576	579	and	and	CC
580	588	reporter	reporter	NN
589	593	gene	gene	NN
594	607	transcription	transcription	NN
608	610	of	of	IN
611	615	Stat	Stat	NNP
616	618	5b	5b	NN
619	621	in	in	IN
622	635	erythroblasts	erythroblast	NNS
635	636	.	.	.

637	639	In	in	IN
640	648	contrast	contrast	NN
648	649	,	,	,
650	656	ligand	ligand	NN
657	667	activation	activation	NN
668	670	of	of	IN
671	676	c-Kit	c-kit	NN
677	680	was	be	VBD
681	687	unable	unable	JJ
688	690	to	to	TO
691	697	induce	induce	VB
698	701	any	any	DT
702	704	of	of	IN
705	710	these	these	DT
711	718	effects	effect	NNS
719	721	in	in	IN
722	725	the	the	DT
726	730	same	same	JJ
731	736	cells	cell	NNS
736	737	.	.	.

738	748	Activation	Activation	NNP
749	751	of	of	IN
752	755	the	the	DT
756	770	erythropoietin	erythropoietin	NN
771	779	receptor	receptor	NN
780	786	caused	cause	VBD
787	795	specific	specific	JJ
796	807	DNA-binding	dna-binding	NN
808	810	of	of	IN
811	815	Stat	Stat	NNP
816	818	5b	5b	NN
818	819	,	,	,
820	823	but	but	CC
824	830	failed	fail	VBD
831	833	to	to	TO
834	840	induce	induce	VB
841	849	reporter	reporter	NN
850	854	gene	gene	NN
855	868	transcription	transcription	NN
868	869	.	.	.

870	875	These	these	DT
876	887	biochemical	biochemical	JJ
888	896	findings	finding	NNS
897	906	correlate	correlate	VBP
907	916	perfectly	perfectly	RB
917	921	with	with	IN
922	925	the	the	DT
926	935	selective	selective	JJ
936	943	ability	ability	NN
944	946	of	of	IN
947	953	c-ErbB	c-erbb	NN
954	956	to	to	TO
957	962	cause	cause	VB
963	972	sustained	sustained	JJ
973	977	self	self	NN
978	985	renewal	renewal	NN
986	988	in	in	IN
989	998	erythroid	erythroid	JJ
999	1010	progenitors	progenitor	NNS
1010	1011	.	.	.