Human erythropoietin with 2 aa substitutions to enhance glycosylation (5 N-linked chains), 165 residues (MW=37 kD). Produced in Chinese hamster ovary (CHO) cells by recombinant DNA technology. Aranesp https://www.creativebiomart.net/therapeutic-proteins/p/64/human-erythropoietin-with-2-aa-substitutions/