CelStrep follows a Michaelis–Menten kinetics towards CMC: the KM for this substrate is 9.7 ± 0.8 mg ml-1 similar to that reported by Theberge et al. [51], and 9-fold lower than that reported by Wittmann et al. [52], and the vmax is 3469 ± 35 μM min-1 corresponding to 600 IU/mg of enzyme, that is 6- and 30- fold higher than those reported by Wittmann et al. [52] and Theberge et al. [51], respectively.