... lower levels from 12:01 h to 14:00 h compared with other times of day ( Table 1 , Fig. 4 ). Complement activity varied significantly with time of day in SGF, with levels decreasing mid-morning then increasing again in the afternoon, whereas in GFC, complement levels were fairly constant throughout most...

... of the innate components (natural antibodies and complement-mediated lysis), and a modified quantitative enzyme-linked immunosorbent assay in birds held in captivity to assess the acquired component (humoral antibodies against tetanus and diphtheria toxoid)of immunity. Ruddy turnstones showed the highest levels...

...Lori A. Clow; David A. Raftos; Paul S. Gross; L. Courtney Smith SUMMARY The purple sea urchin Strongylocentrotus purpuratus expresses a homologue of complement component C3 (SpC3), which acts as a humoral opsonin. Significantly increased phagocytic activity was evident when yeast target cells were...