Table 1.

Binding activity of packaging signal RNAs to the N-protein or deletion mutants by ONPG assay.

Protein	Region (amino acid)	LacZ Translation inhibition efficiency (%)		Binding Efficiency
		MHV-PS97	hCoV-PS100
Full N	1–365	86	66	+++++
N1(45-181)	45–181	53	35	+++
N2(1-181)	1–181	83	59	+++++
N3(1-365)	1–365	80	63	+++++
N4(45-365)	45–365	53	56	++++
N5(182-365)	182–365	19	14	+
N6(182-422)	182–422	32	25	++
N7(249-365)	249–365	42	49	++++