Western blotting analysis using Flag tag antibody (Cat#T024). Recombinant multi-tag protein (5 ng) in E. coli were loaded and separated by SDS-PAGE. The blot was incubated with Flag tag antibody (Cat#T024, 1:10,000) and HRP-conjugated goat anti-mouse secondary antibody (Cat#101, 1:20,000) respectively. Image was developed using NaQ™ ECL Substrate Kit (Cat#716).