Rekombinant interferon alfa- 2b er covalent konjugeret med monomethoxypolyethylenglycol med en gennemsnitlig substitutionsgrad på 1 mol polymer/ mol protein.
Recombinant interferon alfa-2b is covalently conjugated with monomethoxy polyethylene glycol at an average degree of substitution of 1 mole of polymer/mole of protein.