Relationship between sugar chain structure and biological activity of recombinant human erythropoietin produced in Chinese hamster ovary cells. (1989)

Takeuchi M, Inoue N, Strickland T, Kubota M, Wada M, Shimizu R, Hoshi S, Kozutsumi H, Takasaki S, Kobata A
Proc Natl Acad Sci USA, 1989 vol.86:7819-7822