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. Author manuscript; available in PMC: 2015 Apr 7.
Published in final edited form as: Biotechnol J. 2010 Jan;5(1):17–23. doi: 10.1002/biot.200900267

Figure 4.

Figure 4

Influenza HA-specific total serum IgG responses. Day 0, 25 (post-immunized) and 47 (22 days post-boost) serum IgG antibody responses were assessed by ELISA against H1N1 A/California/07/2009 standard antigen (NIBSC). Sera were 1:3200 pre-diluted. Negative controls (neg. contr.) and baculovirus controls (BV) showed only background levels of specific anti-HA IgG at all time points, whereas A/California/04/2009 VLPs (VLP) raised high levels of specific anti-HA antibodies. Absorbances were read at 492 nm and results are expressed as arithmetic mean titer.