Antibody terminology

CDR; complementarity determining region

CH; constant heavy

CL; constant light

Fab; antigen binding fragment

FC; fragment crystallizable region

FR; framework residues

scFv; single chain variable fragment

sdAb; single domain antibody

V(d) J; Variable, Diversity, Joining

VHH; a single variable (VH) domain on a heavy chain (VHH)

VH; variable heavy chain

VL; variable light chain

V-NAR; variable antigen-binding domain of the new antigen receptor