TABLE 1.

Plasmids, cell lines, and viruses used in this study

Us9 mutation(s)	EGFP fusion plasmid	Cell line	Virus
Wild type	pBB14	PK15–BB14	PRV Be
del 46–55	pAB35a	PK15–AB35	PRV 162
L30–31A	pAB37a	PK15–AB37	PRV 166
Y49–50A S51A S53A	pAB62	PK15–AB62	PRV 170
E52A D54A N55A E56A	pAB63	PK15–AB63	PRV 171
Y49–50A	pAB64	PK15–AB64	PRV 172
S51A S53A	pAB65	PK15–AB65	PRV 173

^aPlasmids pAB35 and pAB37 and the corresponding cell lines, PK15–AB35 and PK15–AB37, have been described previously (8).