(A) A schema shows the main structural elements of
F(ab’)2 conjugates with deglycosylated horseradish
peroxidase (HRP) and glucose oxidase (GOx) synthesized by using
metal-free click chemistry. (B) A schema of enzymatic
activity complementation involving reaction between GOx conjugated to
F(ab’)2 and glucose that provides hydrogen
peroxide used by HRP in the presence of 5-hydroxytryptamide of
2,2′,2′′-(10-(2,6-dioxotetrahydro-2H-pyran-3-yl)-1,4,7,10-tetraazacyclododecane-1,4,7-triyl)triacetic
acid-chelated gadolinium (III) or gallium 68 (68Ga)
(III).