TABLE 2.

Percent specific lysis of IIIB-infected CEM.NKR cells by different positively selected human effector cell populations in the presence of pooled, human seropositive sera (10⁻³ dilution)

E/T ratio	% Specific lysis for indicated effector cell populationa
	Total PBMC	CD56+	CD19+	CD14+
100	33 ± 2	ND	ND	ND
33	16 ± 4	30 ± 4	0 ± 1	0 ± 2
11	0 ± 4	13 ± 3	0 ± 2	0 ± 2
3	ND	6 ± 2	0 ± 1	1 ± 1

^aEffector cell populations were prepared as described in Materials and Methods. Errors represent the standard deviations of triplicate measurements. ND, not determined.