“…15 Cellulose, the most abundant biopolymer on the planet, offers excellent performance for wide application with its advantages of non-toxicity, biodegradability, renewability and low cost. 16 From our previous studies, 17–19 cellulose filter paper (CFP), as a novel carrier material for enzyme immobilization, has shown great application potential, attributing to its enormous specific surface area, ease of functionalization, superior biocompatibility and low cost. More importantly, it can be instantaneously removed from the enzymatic reaction system, thus greatly facilitating the subsequent inhibitor screening procedure.…”