Table 2.

Cross-reactivity of epiA and epiB polypeptides with affinity-purified anti-epiA antibodies P^aP

Antibody source	IgG Rec-ELISA (OD) PbP
	GST-epiA	GST-epiB	GST-SP4	GST
Sera mixture	2.802	1.332	2.866	0.256
Anti-epiA (150 ng mL-1)	2.107	2.124	2.274	0.092
Anti-epiA (30 ng mL-1)	0.601	0.609	0.660	0.047

^{Pa P}Recombinant antigens were P^Panalyzed by IgG Rec-ELISA with a homogeneos mixture of human sera (diluted 1:50) or with affinity-purified anti-epiA antibodies

^{Pb P}The cutoff values for the IgG Rec-ELISA with the recombinant GST-epiA, GST-epiB, and GST-SP4 proteins were calculated as two times the OD readings obtained with the GST. Boldface type, OD values greater than the cutoff values.