Two-dimensional gel electrophoresis analysis of secreted proteins of P. infestans. Circled spots highlighted by a number correspond to nine identified Pex proteins from a total of 30 spots analyzed using mass spectrometry of tryptic peptides. (1) BE777050, arabinofuranosidase/β-xylosidase; (2) BE776562, acidic chitinase; (3) BE776874, enoyl Coenzyme A hydratase; (4,5) BE777263, glutathione-S-transferase; (6) BE776368, unknown protein; (7) BE776395, similar to P. sojae avr1b; (8) BE777082, unknown protein; (9) BE776294, peptidylprolyl isomerase.