Engineering plasmid-free, antibiotic-free, and inducer-free Escherichia coli strain for efficient 2′-fucosyllactose biosynthesis - Binglin Li; Zhiqiang Liu; Yanfeng Liu; Jianghua Li; Guocheng Du; Xueqin Lv; Xianhao Xu; Long Liu (Bioresource Technology, 2026)