Methods and materials are provided for the production of compositions of erythropoietin protein, wherein said {HEAD ~ compositions} comprise {TAIL ~ a pre selected N linked glycosylation pattern} as the predominant N glycoform 
comprise
Methods and materials are provided for the production of compositions of erythropoietin protein , wherein said { HEAD ~ compositions } comprise { TAIL ~ a pre selected N linked glycosylation pattern } as the predominant N glycoform
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH