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
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