TABLE 1.
Characteristics of SFV isolates
| Isolate | Stock titer (PFU/ml)a | Specific infectivityb | Binding to cellsc | Internalizationd |
|---|---|---|---|---|
| Wild type | 3.0 × 108 | 100 | 72.9 | 71.25 |
| SHQL | 3.3 × 108 | 0 | 8.45 | 4.09 |
| SHQL R64 | 4.0 × 105 | 0.26 | 8.04 | 5.96 |
| SHQL R64/R4 | 1.6 × 106 | 0.55 | 11.73 | 9.54 |
| SHQL I244 | 2.0 × 104 | 0.037 | 26.44 | 7.27 |
| SHQL K244 | 2.0 × 104 | 0.030 | 16.12 | 7.0 |
a
Virus produced from transfection of 107 BHK cells during a 24-h incubation.
b
The infectivity of an arbitrarily chosen amount (PFU) was correlated with the protein content of the viral particles as measured by gel electrophoresis. Wild type was given a value of 100.
c
Percentage of input virus (mean of three experiments [SD = 10%]).
d
Percentage of bound virus (mean of three experiments [SD = 10%]).