A non-naturally occurring type-1 interferon having 166 amino acids produced by recombinant technique using a synthetic DNA coding sequence. As expressed in E. coli, the product is nonglycosylated and has an N-terminal methionine. N-L-Methionyl-22-L-argini Suppliers, A non-naturally occurring type-1 interferon having 166 amino acids produced by recombinant technique using a synthetic DNA coding sequence. As expressed in E. coli, the product is nonglycosylated and has an N-terminal methionine. N-L-Methionyl-22-L-argini Manufacturers.