Figure 2
From: Enhance nisin yield via improving acid-tolerant capability of Lactococcus lactis F44
Effect of different acid tolerance genes on nisin titer in 8h (at the peak value).
Original strain F44, strains overexpressing acid tolerant genes and strains overexpressing lactic acid synthetic genes were grown in feed medium at 30 °C and photographed every 2 h. Comparative nisin production in F44 and engineered strains. Error bars, SD from three replicate flasks. *p < 0.05, **p < 0.01, t-test.
