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BGSN3 is a good substrate for the SNAP-tag? and H5 enzymes. The activities of SNAP-tag? and H5 enzymes on BGSN3 are reasonable (IC50=17.8 and 10 μM, respectively)[1]. BGSN3 is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.

[1] Merlo R, et al. The SNAP-tag technology revised: an effective chemo-enzymatic approach by using a universal azide-based substrate. J Enzyme Inhib Med Chem. 2021;36(1):85-97. DOI:10.1080/14756366.2020.1841182