From: Critical assessment of influenza VLP production in Sf9 and HEK293 expression systems
 | Sucrose cushion samples | Iodixanol purified samples | |||||
---|---|---|---|---|---|---|---|
Cell line | HA protein activity (HA assay) | HA protein content (SRID assay) | VLP conc. (NSTEM) | Baculovirus contamination (NSTEM) | HA protein activity (HA assay) | VLP conc. (NSTEM) | Baculovirus contamination (NSTEM) |
Insect Sf9 | 335 HAU/ml | 0.38 μg/ml | 5.85 × 109 VLPs/ml | 1.12 × 1011 BV/ml | 32.4 HAU/ml | 2.39 × 109 VLPs/ml | 1.73 × 1010 BV/ml |
Mammalian HEK 293 | 13 HAU/ml | 0.092 μg/ml | 1.50 × 108 VLPs/ml | 3.07 × 107 BV/ml | 8.11 HAU/ml | 7.71 × 107 VLPs/ml | Not quantified |