0	5	CIITA	CIITA	NNP
6	15	activates	activate	VBZ
16	19	the	the	DT
20	30	expression	expression	NN
31	33	of	of	IN
34	37	MHC	MHC	NNP
38	43	class	class	NN
44	46	II	ii	CD
47	52	genes	gene	NNS
53	55	in	in	IN
56	61	mouse	mouse	NN
62	63	T	t	NN
64	69	cells	cell	NNS
69	70	.	.	.

72	74	It	it	PRP
75	78	has	have	VBZ
79	83	long	long	RB
84	88	been	be	VBN
89	90	a	a	DT
91	97	puzzle	puzzle	NN
98	102	that	that	IN
103	106	MHC	MHC	NNP
107	112	class	class	NN
113	115	II	ii	CD
116	125	molecules	molecule	NNS
126	129	are	be	VBP
130	139	expressed	express	VBN
140	142	in	in	IN
143	148	human	human	JJ
149	150	T	t	NN
151	156	cells	cell	NNS
157	162	after	after	IN
163	173	activation	activation	NN
174	177	but	but	CC
178	181	not	not	RB
182	184	in	in	IN
185	190	mouse	mouse	NN
191	192	T	t	NN
193	198	cells	cell	NNS
198	199	;	;	:
200	204	this	this	DT
205	215	expression	expression	NN
216	218	is	be	VBZ
219	227	believed	believe	VBN
228	230	to	to	TO
231	235	play	play	VB
236	237	a	a	DT
238	242	role	role	NN
243	245	in	in	IN
246	249	the	the	DT
250	254	cell	cell	NN
255	263	mediated	mediated	JJ
264	270	immune	immune	JJ
271	279	response	response	NN
279	280	.	.	.

281	289	Recently	recently	RB
290	293	the	the	DT
294	297	MHC	MHC	NNP
298	303	class	class	NN
304	306	II	ii	CD
307	321	transactivator	transactivator	NN
322	323	(	(	(
323	328	CIITA	CIITA	NNP
328	329	)	)	)
330	333	has	have	VBZ
334	338	been	be	VBN
339	347	reported	report	VBN
348	350	to	to	TO
351	353	be	be	VB
354	355	a	a	DT
356	361	major	major	JJ
362	372	regulatory	regulatory	JJ
373	379	factor	factor	NN
380	383	for	for	IN
384	388	both	both	CC
389	392	the	the	DT
393	405	constitutive	constitutive	JJ
406	409	and	and	CC
410	413	IFN	ifn	NN
414	423	inducible	inducible	JJ
424	434	expression	expression	NN
435	437	of	of	IN
438	441	MHC	MHC	NNP
442	447	class	class	NN
448	450	II	ii	CD
451	456	genes	gene	NNS
456	457	.	.	.

458	462	Here	here	RB
463	465	we	we	PRP
466	470	show	show	VBP
471	475	that	that	IN
476	481	human	human	JJ
482	483	T	t	NN
484	489	cells	cell	NNS
490	500	expressing	express	VBG
501	504	MHC	MHC	NNP
505	510	class	class	NN
511	513	II	ii	CD
514	518	have	have	VBP
519	524	CIITA	CIITA	NNP
525	536	transcripts	transcript	NNS
537	542	while	while	IN
543	546	MHC	MHC	NNP
547	552	class	class	NN
553	564	II-negative	ii-negative	JJ
565	570	human	human	JJ
571	572	T	t	NN
573	578	cells	cell	NNS
579	582	and	and	CC
583	588	mouse	mouse	NN
589	590	T	t	NN
591	596	cells	cell	NNS
597	599	do	do	VBP
600	603	not	not	RB
603	604	.	.	.

605	608	The	the	DT
609	619	expression	expression	NN
620	622	of	of	IN
623	626	MHC	MHC	NNP
627	632	class	class	NN
633	635	II	ii	CD
636	641	genes	gene	NNS
642	644	in	in	IN
645	650	mouse	mouse	NN
651	652	T	t	NN
653	658	cells	cell	NNS
659	662	can	can	MD
663	665	be	be	VB
666	679	reconstituted	reconstitute	VBN
680	684	upon	upon	IN
685	697	transfection	transfection	NN
698	702	with	with	IN
703	706	the	the	DT
707	712	human	human	JJ
713	718	CIITA	CIITA	NNP
719	723	cDNA	cDNA	NNP
723	724	.	.	.

725	730	These	these	DT
731	735	data	datum	NNS
736	744	indicate	indicate	VBP
745	749	that	that	IN
750	753	the	the	DT
754	764	expression	expression	NN
765	767	of	of	IN
768	773	CIITA	CIITA	NNP
774	782	explains	explain	VBZ
783	786	the	the	DT
787	797	expression	expression	NN
798	800	or	or	CC
801	805	lack	lack	NN
806	808	of	of	IN
809	819	expression	expression	NN
820	822	of	of	IN
823	826	MHC	MHC	NNP
827	832	class	class	NN
833	835	II	ii	CD
836	838	in	in	IN
839	844	human	human	JJ
845	848	and	and	CC
849	854	mouse	mouse	NN
855	856	T	t	NN
857	862	cells	cell	NNS
863	875	respectively	respectively	RB
875	876	.	.	.