Domain organization of FaeI, FaeII, and FaeIII constructed based on Pfam analysis., signal peptide; , feruloyl esterase; , ricin; , carbohydrate binding module 2 (CBM2); , unknown domain. The predicted molecular masses of FaeI, FaeII, and FaeIII were 58 kDa, 31.5 kDa, and 42 kDa, respectively.