Table 2.

Synergism factor and binding affinities of mixtures of proteins at 0.2:1 ratio.

Toxins Cyt1Aa:Cry4Ba	Predicted LC50 (ng/ml)	Experimental LC50 (ng/ml)	SFa
wt:wt	75.2	8.5 (6.5–10.8)b	8.8
K198A:wt	74.5	21.0 (10.1–30.1)	3.5
E204A:wt	66.7	25.2 (20.1–32.3)	2.6
K225A:wt	75.1	41.4 (31.1–52.3)	1.8
wt:α8M2	218.9	38.4 (32.7– 44.7)	5.7
E204:α8M2	158.3	77.2 (67.1–88.9)	2

^aSynergism factor (Predicted LC₅₀/Experimental LC₅₀)

^b95% fiducial limits.