Fig. 2

Extracellular PUL expression driven by the single-promoter systems in ATCC6051∆10. a PUL activity of eleven single promoters in in well plates. b Time profiles of extracellular PUL activity and dry cell weight for the four high viability promoters in ATCC6051∆10. c SDS-PAGE analysis of extracellular PUL expression by these single-promoter plasmid-containing strains. The protein bands of PUL were indicated by arrows