Fig. 2From: Screening and evaluation of the strong endogenous promoters in Pichia pastorisComparison of the selected promoter activities. A–C The β-galactosidase activity of transformant harboring vector pZeocin/PXXX-lacZ-TADH1 (PXXX indicates the name of candidate promoter) after 60 h growth. D–F The relative transcriptional levels of lacZ in different transformants. The ACT1 gene was used as the reference gene. Error bars indicate the SD for samples tested in triplicateBack to article page