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Ramachandran plot of the modeled structures. Ramachandran plot of the modeled structures: (a) membrane protease; (b) spike receptor-binding domain; (c) nonstructural protein 14; (d) transmembrane protease, serine 2. 
General glycine/pre-proline/proline favoured regions; 
General glycine/pre-proline/proline allowed regions; 
Glycine favoured regions; 
Glycine allowed regions.
