Table I. Effect of del-4 on TMV infection^a.

	Lesions
	Number/leaf ± SE	Diameter ± SE (mm)	% of wild-type control (number/diameter)
Wild-type plants inoculated with:
wild-type TMV	85.0 ± 10.2	3.7 ± 1.3	100/100
TMV del-4	0	0	0
MP-transgenic plants inoculated with:
wild-type TMV	80.2 ± 14.3	3.4 ± 1.1	94/92
TMV del-4	84.1 ± 15.2	3.6 ± 1.2	99/97

^aThe number and size of local lesions are the average of four infected wild-type or TMV MP-transgenic N.tabacum cv. Xanthi NN plants in which lesions on four inoculated leaves per plant were counted and measured 5 days after inoculation. SE, standard error. Wild-type TMV, TMV RNA carrying an intact TMV MP; TMV del-4, TMV RNA carrying the del-4 derivative of TMV MP.