TABLE 2.

Biochemical characterization of isolated antibodies and controls^a

Antibody	EC50 (nM)				Tm (°C)
	PTx	PTg	PTx S1-220	PTx B oligomer
A12	0.10 ± 0.03	0.18 ± 0.02	ND	ND	70.69 ± 0.21 (Tm1), 84.59 ± 0.24 (Tm2)
E12	0.13 ± 0.006	0.05 ± 0.02	0.05 ± 0.03	ND	74.27 ± 0.08 (Tm1)
A8	0.15 ± 0.003	0.3 ± 0.08	0.02 ± 0.006	ND	62.06 ± 0.68 (Tm1), 72.29 ± 2.52 (Tm2)
D8	0.14 ± 0.04	0.11 ± 0.08	ND	0.78 ± 0.22	74.05 ± 1.00 (Tm1)
H5	0.02 ± 0.01	0.06 ± 0.03	ND	0.11 ± 0.05	70.69 ± 0.74 (Tm1), 89.34 ± 0.70 (Tm2)
hu1B7	0.06 ± 0.01	0.07 ± 0.03b	0.008 ± 0.002	ND	ND
hu11E6	0.17 ± 0.03	0.06 ± 0.007b	ND	1.18 ± 0.19	ND
P-IVIG	4.26 ± 1.27	1.05 ± 0.04	9.39 ± 1.67	ND	ND

^aData are means ± SE. ND, not determined.

^bA murine antibody was used.