Figure 1: Titration of specific IgG antibodies from rabbits immunized with native or Dpg-Pol extracts of B. alba. Two rabbits were used for each extract. B. alba native extract, rBet v 1, and rBet v 2 specific IgG are shown. (a) Solid phase native B. alba extract, (b) solid phase rBet v 1, and (c) solid phase rBet v 2.