3.4.23.B18	Processing of viral polyprotein. Selective for large aromatic residues (Tyr and Phe) at position P1. Phe and Leu are preferred at position P3. No hydrolysis of substrates with Gly or Ala at position P3. Medium-sized or large hydrophobic residues as Ile, Leu and Phe are preferred at position P4.	-	-