Fig. 3.

Enhanced expression of SARS-CoV Nucleocapsid protein (Nc) by SUMO-fusion in E. coli. The conditions for cell culture, protein expression, and gel detection were the same as in Fig. 2. The yields of expressed SUMO-Nc proteins were higher than the Nc expressed without SUMO in minimal media, but there were no significant differences in their expression in LB media.