S starting from a new biodegradable and biocompatible material, epsilon-polylysine (EPL). Biosynthetic EPL is a linear cationic polymer (Mw 4600) with antimicrobial activity that found applications mostly as non-toxic food additive (Hamano 2011). Compared to normal L-polylysine, it is significantly less toxic and can be produced microbiologically in large amount and with narrow polydispersity. Pre