The present invention relates to the field of molecular biology, in particular the invention provides materials and methods for the production of homogeneous compositions of {TAIL ~ PEGylated erythropoietin} with {HEAD ~ desired N glycoforms} 
The present invention relates to the field of molecular biology , in particular the invention provides materials and methods for the production of homogeneous compositions of { TAIL ~ PEGylated erythropoietin } with { HEAD ~ desired N glycoforms }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD