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Modeled 3D structures (ribbon view) of proteins and their topology. (A) Human CD30, (B) human CD15, (C) SARS-CoV-2 M protein, and (D) Epstein-Barr virus LMP-1 protein. Note: the red color shows the extracellular location and corresponding amino acid residues, green shows the transmembrane location and corresponding amino acid residues, and purple color indicates the intracellular or cytoplasmic location and corresponding amino acid residues.
