Table 3. Virus titer and plaque phenotypes of recombinant ACal-04/09 viruses.

Viruses	Residues 30/142/207/209	Maximum Titer(LogTCID50/ml)	PlaqueSize (mm)
A/California/04/2009 WT	S/A/N/T	7.4	0.7
A/California/04/2009 M1 S30D	D/A/N/T	6.9	0.3
A/California/04/2009 M1 A142T	S/V/N/T	6.6	0.5
A/California/04/2009 M1 N207S	S/A/S/T	6.0	0.3
A/California/04/2009 M1 T209A	S/A/N/A	6.6	0.4
A/California/04/2009 M1 207/209	S/A/S/A	6.0	0.3