TABLE 3.

Effect of phenotype of head on H-T joining and ExoV protection^a

gp2	H+			H(N)			H(C)			H(E)
	Total	2+	2+/total ratio	Total	2+	2+/total ratio	Total	2+	2+/total ratio	Total	2+	2+/total ratio
−	19	19	1.0	9.5	0.63	0.066	0.43	0.12	0.27	3.3	1.4	0.44
+	36	40	1.1	90	1.34	0.015	94	5.3	0.057	65	8.7	0.13
Δ	17	21	1.25	80	0.71	0.009	94	5.2	0.055	62	7.3	0.12
H(X)	0.034	0.029		0.046	0.060		0.01	0.019		0.39	0.096
T(E)	0.29	0.043		0.29	0.043		0.29	0.043		0.29	0.043

^aValues in rows 1 to 3 are titers (10⁸) of reconstitution mixtures after incubation at 30°C for 60 min. Total phage titers were determined on E. coli JC7735, and 2⁺ phage titers were determined on E. coli B40. Values in rows 4 and 5 are titers (10⁸) of unmixed extracts.