Table 1.

Binding characteristics of patient-derived PRT/heparin antibodies (CPB1-4)

CPB	PRT/heparin	PRT alone	PRT/dextran	CHO	HUVEC	EA.hy926
1	1.50 ± 0.09	0.17 ± 0.07	0.06 ± 0.002	0.54 ± 0.01	0.19 ± 0.07	0.25 ± 0.01
2	1.15 ± 0.09	0.07 ± 0.01	0.33 ± 0.06	0.37 ± 0.03	0.21 ± 0.06	0.35 ± 0.03
3	1.50 ± 0.00	0.47 ± 0.01	0.83 ± 0.04	1.23 ± 0.02	0.99 ± 0.01	1.26 ± 0.01
4	0.90 ± 0.01	0.25 ± 0.03	1.14 ± 0.22	0.88 ± 0.01	0.73 ± 0.17	0.52 ± 0.08

For each assay, reactivity (mean A_{450 nm} ± standard deviation) is depicted. All data shown are representative of 3 independent determinations.