Table II. IgE reactivity of rBet v 1, recombinant fusion proteins, and PreS.

Subject ID	2PA-PreS	2PB-PreS	4PA-PreS	2PAPB-PreS	PreS	rBet v 1
NA1	0.048	0.036	0.037	0.024	0.017	0.018
NA2	0.072	0.063	0.055	0.055	0.039	0.031
NA3	0.039	0.027	0.027	0.024	0.013	0.014
Mean OD nonallergics	0.053	0.042	0.039	0.034	0.023	0.021
A1	0.046	0.013	0.032	0.011	0.004	0.309
A2	0.038	0.014	0.021	0.015	0.004	0.380
A3	0.038	0.024	0.030	0.029	0.012	0.417
A4	0.035	0.024	0.029	0.023	0.012	0.344
A5	0.067	0.063	0.045	0.040	0.022	0.494
A6	0.044	0.023	0.029	0.021	0.012	0.296
A7	0.049	0.041	0.043	0.035	0.030	0.299
A8	0.026	0.004	0.012	−0.004	−0.005	0.194
A9	0.043	0.027	0.038	0.025	0.021	0.665
A10	0.025	0.011	0.019	0.010	0.005	0.130
A11	0.037	0.014	0.029	0.012	0.009	0.994
A12	0.029	0.023	0.031	0.018	0.015	0.681
A13	0.020	0.007	0.012	0.005	0.000	0.124
A14	0.033	0.023	0.030	0.020	0.010	0.116
A15	0.029	0.021	0.022	0.023	0.008	0.231
A16	0.032	0.018	0.022	0.015	0.008	0.383
A17	0.039	0.030	0.038	0.033	0.018	0.110
A18	0.048	0.026	0.039	0.022	0.011	0.411
A19	0.031	0.019	0.024	0.010	0.003	0.122
A20	0.019	0.013	0.015	0.009	−0.001	0.279
A21	0.028	0.022	0.029	0.016	0.011	0.166
Mean OD allergics	0.036	0.022	0.028	0.018	0.010	0.340

OD values (means of duplicate determinations) corresponding to IgE levels specific for the fusion proteins (2PA-PreS, 2PB-PreS, 4PA-PreS, 2PAPB-PreS), PreS and for rBet v 1 are shown for sera from 21 patients allergic to birch pollen (A1–A21) and three nonallergic individuals (NA1–NA3).