Comparison between glucose biosensors based on mediated (MET) and direct electron transfer (DET). List of abbreviations: 1,1′-dimethylferrocene (DMFc), 1,2-diaminobenzene (p-DAB), 4-aminophenol (4-APh), 4-mercaptobenzoic acid (4-MBA), Corynascus thermophilus cellobiose dehydrogenase (CtCDH), Corynascus thermophilus cellobiose dehydrogenase C291Y mutant (CtCDH C291Y), ferrocene-COOH (Fc-COOH), glassy carbon electrode (GC), glucose oxidase (GOx), glutaraldehyde (GA), gold (Au), gold nanoparticles (AuNPs), osmium (bpy)2poly (1-vinylimidazole) (PVI-Os), Prussian Blue (PB), screen-printed carbon electrode (SPCE), single walled carbon nanotubes (SWCNTs), titanium nanotubes (TiNTs).