Fig. 1From: Recent advances in microbial ε-poly-L-lysine fermentation and its diverse applicationsMicrobial ε-PL biosynthetic pathway from glucose and glycerol [150, 151]. The domain architecture of ɛ-PL synthase (Pls), including six transmembrane domains (TM1 to TM6) and three tandem domains (C1–C3), is shown schematically [58]Back to article page