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AppA displays the 3D rendition of the heavy chain of a therapeutic monoclonal antibody (blue color) with the associated antigen of human interferon alpha-2A (salmon color) (PDB code: 4YPG) using JSMol (http://www.jmol.org/). The contact residues of antibody and antigen are highlighted in sticks. As seen, the structure (conformations) of the antigen of human interferon alpha-2A is mainly composed of alpha-helices.
