X-ray crystallography and mass spectroscopy reveal that the N-lobe of human transferrin expressed in Pichia pastoris is folded correctly but is glycosylated on serine-32. (1999)

Bewley M, Tam B, Grewal J, He S, Shewry S, Murphy M, Mason A, Woodworth R, Baker E, MacGillivray R
Biochemistry, 1999 vol.38:2535-2541