SOD1 and brucellosis: For instance, outer membrane proteins (Omps) Omp28 (BP26), Omp16, Omp25, Omp31, Omp2b, DnaK, Elongation Factor Tu (EF-Tu), and Cu-Zn superoxide dismutase (SOD) have been identified as significant in the diagnostic and immunological studies of brucellosis (6, –, 10).