Table 1.

Binding of protein p4 and RNA polymerase to PA3 and PA2c in the absence or presence of protein p6

	Protein p4 (nm)
	330	160	80	40	20		330	160	80	40	20
	− protein p6						+ protein p6
RNAPA3	100	89	25	0	0		100	100	96	91	66
p4A3	100	85	17	0	0		100	100	100	89	43
RNAPA2c	100	100	100	100	100		0	0	5	10	35
p4A2c	100	90	14	0	0		0	0	0	0	0

Data were obtained by densitometric scanning of the specific bands at positions marked in boxes in Fig. 3. The numbers represent relative percentages obtained after correcting for sample loading variations and background. A value of 100 was arbitrarily assigned to the maximum binding (maximum protection for the +3 band for RNAP_A3; maximum hypersensitivities for the bands at −75 for p4_A3, −56/−57 for p4_A2c, and −37 for RNAP_A2c).0 corresponds to no binding, i.e., values equal to background.