Sc-SRP-6 expression was induced in both strains under several different conditions including 0.5 mM isopropyl β-D-1-thiogalactopyranoside (IPTG) at 37°C for 3 hrs, 1 mM IPTG at 37°C for 3 hrs, 0.5 mM IPTG at 20°C overnight and 1 mM IPTG at 20°C overnight.