We are looking at the binding face or "paratope" of an antibody. This shows a backbone model of the variable domains of a single immunoglobulin Fab arm, hence the "Fv" or variable fragment. The 6 complementarity-determining regions (CDR's) are thicker.

This image was constructed from images in a RasMol "movie" script. The atomic coordinate file employed is 1FDL.PDB.


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