Fig. 1

Map of the constructed protein expression plasmid harboring CBM66 fusion tag. The target protein was designed to be expressed with a CBM66 tag on the N-terminus and a His-tag on the C-terminus under the T7 promoter. The flexible linker between CBM66 and the passenger protein comprised a double repeat of four glycine and one serine [(G4S)2]. EK site indicates enterokinase recognition sequence (D4K)