TABLE 1.

T4 plaque phenotypes on E. coli strains

Strain	Chromosomal rpoB	Plasmid	Plaque size
			T4D+	T4 motA(Am)	T4 asiA(Am)
TabG	E835K G1249D		Normal	None	None
BL21(DE3)	wt		Normal	Small	Small
B11	E835K G1249D		Normal	Nonea	None
TabG	E835K G1249D	pwtrpoB	Normal	Small	NTb
BL21(DE3)	wt	pE835K/G1249D	Normal	Smallerc	NT
B11	E835K G1249D	pwtrpoB	Normal	Small	NT
B11	E835K G1249D	pwt835/G1249D	Normal	None	None
B11	E835K G1249D	pE835K/wt1249	Normal	Small	Small

^aBarely perceptible.

^bNT, not tested.

^cSmaller plaques than those made by T4 motA(Am) in BL21(DE3) without plasmid.