Two-dimensional gel electrophoresis. Separation of proteins in EFN from A. hindsii (A), A. collinsii (B), A. farnesiana (C), and P. juliflora (D) by two-dimensional gel electrophoresis (10% SDS-PAGE). C, Chitinase proteins; G, glucanase proteins; H, glycoside hydrolase proteins; Myrm., myrmecophytes; Non-myrm., nonmyrmecophytes; O, osmotin proteins; P, PR proteins; T, thaumatin-like proteins; U, unknown proteins.