Fig. 5From: A FRET-based biosensor for the quantification of glucose in culture supernatants of mL scale microbial cultivationsFRET-ratio (a), glucose depletion (b) and biomass growth (c) in an E. coli cultivation in M9 medium measured with the FRET-based biosensor immobilized on HaloLink® resin. The FRET-ratio was used to calculate the current d-glucose concentration based on a calibration of the immobilized sensor (see Additional file 1: Figure S9)Back to article page