Figure 2.

Induction of serine proteinase activity.

A. Serine protease activity in nine transformants growing in TM broth with humic acid (H) or glutamate (G) as sole nitrogen source.

B. Dry weights of transformants: A15 is the wild type strain, and ATA4 are control transformants.

C. Normalized serine proteinase activity with respect to biomass. Error bars are standard error of the mean of five biological replicates. A. bisporus transformants harbouring the Spr1 sense (S), anti‐sense (AS) and untranslatable sense (ST) constructs. Results were statistically analysed using t‐test and significant results are indicated by an asterisk (*).