Figure 4.

Measures of synergy between cationic protein and antigen treatments. The mean elevations in R, G, and H after each dose of methacholine were calculated as fractions of their respective baseline values measured before any of the challenges were given. Synergy is the ratio of the elevation in a parameter from the PLL+Ova group to the sum of the elevations from the PLL and Ova groups. Ova = ovalbumin; PLL = poly-l-lysine. *Significant difference compared with R in the same strain (unpaired t test).