Figure 1.

Pattern of AO activity bands from Arabidopsis seedlings after native PAGE. Ammonium sulfate-fractionated crude enzyme samples were obtained from 8-d-old seedlings of the wild type and the sur1 mutant. Gel electrophoresis and activity staining were performed as described in Methods using benzaldehyde (a) or IAld (b) as the substrates. Eighty micrograms of protein was loaded in each lane. The positions of the three bands, AO1, AO2, and AO3, are indicated with arrows.