Table 2.

Titers of infectious copy-derived viruses (A/Turkey/2/2006 capsid) with K/Q, K/K, or R/K at VP1 109/110

Infectious copy plasmid and virus	VP1 109/110a	Titer of virus in cell typeb
		pBTY	BHK	CHO	CHO-677	CHO-745
pO1K-A	K/Q
O1K-A/BTY1	K/Q	3.5 × 106	2.5 × 105	0	0	0
O1K-A/BTY1/BHK1	K/Q	2.5 ×107	4 × 106	0	0	0
O1K-A/BTY1/BHK4	K/K	ND	1.9 × 107	1.7 × 105	2.0 × 105	2.0 × 105
pO1K-A/VP1-Q110K	K/K
O1K-A/VP1-Q110K/BHK1	K/K	3.0 × 106	1.0 × 107	2.0 × 105	2.0 × 104	2.0 × 104
pO1K-A/VP1-109AK110	A/K
O1K-A/VP1-109AK110/BHK2	A/K	ND	1.5 × 105	0	ND	ND
O1K-A/VP1-109AK110/BHK6	A/K	ND	CPE	0	ND	ND
pO1K-A/VP1-109QK110	Q/K
O1K-A/VP1-109QK110/BHK3	Q/K	ND	2.5 × 106	0	ND	ND
O1K-A/VP1-109QK110/BHK6	R/K	ND	4.0 × 107	1.0 × 104	1.0 × 103	ND

^aResidues at VP1 109 and 110.

^b0, no CPE; ND, not done; CPE, cytopathic effect seen but virus titer not determined.