Structure of DsbA/LPETG-tagged TM456 fusion protein (dlTM456F) (A), its SDS-PAGE characterization (B): Lane 1. purified dlTM456F, Lane 2. dlTM456F incubated with human Factor Xa, Lane 3. purified SrtA-ΔN59, Lane 4. molecular makers, and Western blot analysis (C): Lane 1. purified dlTM456F, Lane 2. dlTM456F incubated with human Factor Xa.