Schematic image of (A) BiSpyCatcher2, (B) BiSpyCatcher2-CYS, (C) BiSpyCatcher2-CYS3 (D) Fab with SpyTag coupled to BiSpyCatcher2-Cys conjugated to a label via the Cys residue (E) Fab with SpyTag coupled to BiSpyCatcher2-Cys3 conjugated to a label via the Cys residues.
Supplier Page from Bio-Rad for BISPYCATCHER2:BIOTIN