TABLE 1.

Comparison of mutant E4orf4-induced killing of H1299 and C33A cells^a

Mutant	Mutant phenotype for:
	H1299 cells	C33A cells
L51/54A	Class I	Low expression
T64A/E65A/R66A	Probable class I	Class I
R69A/R70A/R72/73/74/75A	Class I	Low expression
R73/74/75A	Probable class I	Class I
R81A/F84A	Class I	Class I
F84A	Wild-type	Class I
K88A/Y89A	Class I	Low expression
Y89A	Class I	Low expression
W21A	Class II	Class II
L51A	Class II	Class I
I58A	Wild-type	Class II
R81A	Class II	Probable class II
K88A	Class II	Class II
R93/94A	Class II	Class II

^aAnalysis of E4orf4 expression, Bα-subunit binding, PP2A activity, and cell killing was conducted as described for Fig. 4, 5, and 6.